Side by Side Comparison of: Radio Thermostat Company of America vs Honeywell

Mounting the thermostat was easy, the top and bottom pop off to allow easy access to the screw mounting holes and batteries.The on screen interface more or less easy to use, but honestly I almost never actually touch the physical thermostat as explained below.Setup of the WiFi connection was relatively painless, but it does require connecting to the thermostat directly with a WiFi enabled device to select the correct WiFi access point and enter the password. I have never had any issues with the thermostat dropping the connection or not receiving commands.I selected this particular model because in addition to the official mobile app (which I have not used personally) it also offers a REST API that can accessed directly on the device without a connection to the public Internet. In short, this allowed me to write a small web page that runs on a Raspberry Pi computer and I can access from my phone or computer to control the thermostat. They did a good job designing an easy to use API for programmers and the DIY minded, and I'm pleased that because it does not rely on a third-party "cloud" server, I never have to worry about a service out of my control getting hacked or shutdown after a period of time.Overall, I would recommend this thermostat to anyone who is interested in do-it-yourself home automation.

I gave this all 5 stars because it is working well after being installed. I did have a problem installing apparently because Windows 10 will not connect to the thermostat for setup. I think this is because Windows 10 does not support ad-hoc WiFi connections like some older versions of Windows would have. To get setup to work I had to connect to the thermostat's WiFi from my iPhone, then switch my iPhone's WiFi connection back to my home network when the setup completed. All is well after doing that. The thermostat is doing a good job of regulating temperature and the Internet features are working nicely. It's nice to have a home thermostat that I can control from my smartphone.

We have a vacation home and this is the best purchase I have made. Really easy to install and gives you piece of mind, as it monitors temperature and will send an alert if it drops below XX. Best thing is it controlled from your smartphone so you can raise the temp when you leave and by the time you get there its toasty warm. This is the second one I have purchased, the first one stopped working (not sure why)

Great thermostat -- I got it to implement the geofencing (or Radius) feature but liked the fact that I could just copy the program from my old thermostat rather than hoping it would learn to do what I wanted.Wifi is difficult to connect with Windows newer than XP due to the way Windows identifies networks. The company recommends an iPad or Mac and does not support Windows 8.1 or Android phones. After some frustration in an unsuccessful attempt to follow the Windows directions, I used a Linux LiveCD and got it connected in under 2 minutes.It does need a C wire to run the wifi. You can use a transformer to supply the 24V for the wifi. However, I discovered that the Ecom 2 terminal on the oil primary controller on the furnace works as a terminal for a C wire, so I did not have to add a transformer.

I have two of these, 100 miles apart, and 200 miles from where I usually live.One is in a group ski club rental.Installed for 4 months now, and I frequently check them via internet. Always connect great - they are very good at keeping(or re-establishing if local connection is dropped) connected - never have not been able to connect.Ipad app is great for controlling/setting the programmed temps. Iphone app is great for both checking the setting, and also for turnng the furnaceup an hour before we arrive.I really like the history on usage. It is great. Nest and other "high end" thermostats can't do usage/runtime history but this unit can and it works great.It also can save big $$$ if someone at the group ski rental leaves the furnace on a high temp when unoccupied - I can easily turn it down remotely.

It's a fairly basic programmable thermostat, with wi-fi. During setup, you register it with my.radiothermostat.com, which allows you to use the web interface or mobile apps to configure/program/change current settings on your thermostat. The operation appears to be that the thermostat unit keeps the program internally. Thus, if you lose your internet connection, the thermostat will continue to do whatever it was programmed to. The benefit of having it internet-connected is (1) so you can change the temperature when you're away, (2) because it's more intuitive to set programs in a web browser than on the actual thermostat (though you can do it there too), and (3) it shows you usage logs of when your heat / AC were in operation throughout the day.The unit itself is of good quality, though nothing spectacular. The touch screen works fine, though I'd have preferred actual buttons. I preferred the way my previous thermostat mounted -- one piece screwed into the wall, and connected to the wires, and then the actual unit snapped on to that. This one is basically one piece, that screws into the wall. The wires connect at the top, with a small removable plastic panel to cover them from view.The real reason I chose this is because of the API. You can connect directly to the thermostat via the API whether you've registered with my.radiothermostat.com or not. API commands are issued directly to the thermostat's IP, and it's all simple JSON messages. The only disappointment is that there's no authentication, so you probably won't want to expose it publicly.Like just about all wi-fi thermostats, you'll need to have a "C" wire for power. I didn't, so I used the trick of jumpering my "G" (fan) to "Y" at the furnace, and then using the wire that previously connected "G" to the thermostat to instead connect "C". This means I can no longer control my fan independently -- it's on when the furnace/ac is on, and off otherwise.

I had some initial troubles installing the unit but after find the actual power feed down on the furnace board and tapping into it, the unit powered on no problem. Setup was easy and it's proven quite reliable. Managing the HVAC from my smart phone is nice. I rarely use the actual unit but it looks a lot better than the ugly LCD unit I had on there.

I wish I could set the Heat/Cold temperature ranges to a tighter difference. Currently it forces a 3* separation and in my house, that can make a difference in comfort. However, for the cost, I recommend this vs the competitors.

Also, honewell is good and notifying you of planned maintenance if the app link to their servers will be down. Other than that, I've had zero connectivity issues.

Great Thermostat! I read a lot of the reviews prior to purchasing and after receiving mine and installing it myself I dont see what the 3 star and below reviews are about. the unit was not difficult to install, the back-plate / mounting plate seem to be fine and I had no issues with the wiring. The only thing I can figure is that the other people with the lower reviews probably had no business installing a thermostat themselves or probably anything else for that matter. It does take some dexterity to wire the unit. The wires and slots for the wires are small. But other than that..Read the instruction, watch a video or two that Honeywell has or on YouTube and put it on the wall. No big deal. I like the thermostat I purchased and it does appear to work much better then the factory Carrier thermostat I replaced it with. The HVAC heat pump unit actually cycles properly now and the temperature in the house seems to be much more consistent. Two Thumbs Up!

I'm giving a head-to-head review. I've had both a Nest 3rd Generation thermostat and this Honeywell touchscreen thermostat. I like both a lot, actually. It depends on what you're looking for in terms of deciding which is better for you specifically.

I love the simplicity of the Honeywell's touchscreen. And I like that it tells you the outside temps and humidity, the date, and time all on the home-screen, all at once. Nests have much less info on the screen and you need to turn the dial and find everything, like weather, etc. On the Honeywell, to navigate to settings and schedules, there are touchscreen tabs at the top of the screen. Pretty intuitive.

Wiring:
The Honeywell absolutely requires a "C" wire to work. If you don't have one, you will need to run one for the Honeywell for it to work. I originally did not have one, but I had one added for $100 by an electrician. If you don't want to go through the expense or hassle, you may want to go for the Nest instead, because while the system works best with a C wire, it can work without one. But it depends on how much power it can pull from the other wires. Not having a C wire can make its Wi-Fi connectivity spotty/intermittent. And that means sometimes you can't interact with it via the mobile App and delays in it knowing what the external weather is.

Apps:
Nest has its merits, for sure, like their App that gives a lot of insights as to how you're doing with efficiency (like showing that for the past week, Monday, the heater only ran for 15 minutes; and Tuesday, it didn't come on at all... that kind of thing). I will say, however, Honeywell and Nest keep improving their Apps continuously, so as soon as I comment on App features, they change and have new functions... so that's a positive for both products. Who can be upset with constant improvements?

Aesthetics:
Both the Honeywell and Nest are very slick/modern looking. With this Honeywell, having the ability to choose your screen color to work with your décor or style is something that's pretty neat. Or you can change it up when you're bored. The Nest, however, does not have a function to change its color. It is always black. On the other hand, the Nest itself with its circular face is just pretty cool looking on its own. I'll leave you to decide what is more pleasing, as it's a matter of opinion.

Some notes about programming your schedule:
Nests, are all about "learning" about you. So, in default/factory setting mode they are set in "auto" schedule program mode, which means you go about your daily routines and "train" it, so it learns your preferred home temps and schedule. If you're letting it "learn you", it goes something like this... You to wake up, change the temp, leave the house and adjust the temp before doing so, come home and ... You get where I'm going. Finally, after a few days of that, it pretty much understands your patterns (unless you're really unpredictable/erratic). That learning feature can be awesome for some, since some folks want to let it do the work. But some people are more control freaks (like myself) and want to tell it what temps at what times to come on and off from the get-go. So, if you find the learning feature takes too long to learn your schedule, simply read the directions and turn off the auto learn function, and then program your schedule to however you want. The Honeywell does not learn and has you set your desired temps and schedule from the first moment you install it by default. But it gives you quick-set recommendations, which make setting up the schedule super-fast.

Bottom line:
Both are absolutely great thermostats. I love them both for different reasons. Maybe the biggest difference for some would be the "C" wire requirement for Honeywell (if you don't have a C wire in your wall already and if you don't want to have to have that wire added).

I always read reviews before purchasing and find some quite helpful, so I hope you find this review helpful!

This thing is glorious. It has a bright, easily readable screen that is crisp and clear, and it looks nice on my wall. Installation was (mostly) a snap, and took less than 20 minutes to get it from Amazon box to on my wall.

I bought this thermostat for four reasons: 1) It seemed to have more functionality than the NEST, 2) It was about $100 less than the nest, 3) it works with Wink, and 4) I can use set it up for monitoring by my electric company (CPS in SATX), and I'll get ~$120 in rebates, which lowered the cost to purchase to ~$40!

A few nuggets of advice that you might find handy: check what sort of heat source you have in your house, whether it's forced air or a heat pump. If you wired it correctly (after obsessively checking five or fifteen times) and it's still blowing hot air when your AC is nominally on, then you have that particular setting configured incorrectly. Go back and change "forced air" to "heat pump," or vice versa. Also, when you first turn on the unit, there is a five-minute lockdown to prevent the system from blowing itself out. Just wait it out, and go from there. (These things are printed in the instruction manual, but... yeah, I stopped reading once I saw where the wires were supposed to go, so I missed this. Be smarter than I was, and read at least the quick-start guide all the way through.)

I purchased this thermostat for my father. He isn't a big tech fan so I was worried he wouldn't be able to use it. He loves it! It is extremely easy for him to use. He even purchased a second one for the upstairs unit.
Normally I would install something like this myself and be able to give details, but we already had a professional over installing a new air conditioning/heating unit and he offered to install it for no extra charge. I spied on the installation a little and it just looked like a few wires.
Once it has power, there is an easy to follow guide to set all your defaults, wifi and even colors.
Honeywell has an app so you can control this thermostat from your phone when you are away from your home or if you just don't want to get out of bed at night to adjust it. Setting that up was pretty easy. You create an account on Honeywell's website. It will ask you for your thermostats MAC address which you can get right from the thermostat screen. Once done, download the app to your phone (iPhone in this case), sign in and all your controls and current temperature are right there.
Overall, a great product that will help you reduce energy costs.

I wanted to review this to hopefully illustrate why this worked for me. This is not internet dependent like those other big brands. That is a big deal. If this cloud service goes out I cannot access it from outside my home network. But this was one of the very few brands that allow wifi only access. Imagine you get a device that depends on the company's cloud service and if it disconnects you can't access your device at home. That's nonsense. The cloud is not the only way I would need to access it. The device is simple no frills by the way so that sucks. Interface via android works but you have to press several times for it to catch you syncing. Its basic and works but offline (internet) access is what I needed.

Works well now but installing it was a pain. Guide not well written. My problem was only solved by calling tech support. Solution was to unplug internet module and re plug it in. It must have come loose in shipping. App is easy to use and well thought out. I bought a second unit for our main house. The concept is very useful for us.

This was a replacement of an Intwine thermostat for my vacation home. This thermostat is used to adjust the heat and AC while we are away and to prepare for arrival. The prior Intwine model is apparently a private label of an earlier RT model. While the prior thermostat worked fine, the remote access from Intwine was terrible with multiple outages and zero customer service. I elected to replace with this model directly from the supplier RT. The new thermostat works perfectly and the RT remote control website and app is outstanding.I would have given 5 stars, but the RT customer support was not up to the quality of the thermostat. My install site is an evolution of several heating systems and wiring. RT customer support were not very helpful with the complexity of a separate transformer and the heater wiring. While it is mentioned in the install manual, it was not helpful and they were not either. It took a service call with my HVAC supplier to figure it out in an hour. RT customer service said it was the HVAC. Turns out it was the instructions from RT.That said, Intwine and RT should rescue the apparently few remaining Intwine users with a program to migrate them over to the RT website and app.All in all - an excellent piece of equipment and I highly recommend.

As others have said, this device is difficult to program. It's easiest to just install the app, hook the thermostat to your wifi, and program it with your phone. The touchscreen of the device leaves a lot to be desired; you have to press a couple times, most of the time, to make a selection, and the menus are a bit confusingInstallation was easy enough, and connecting it to the wifi was fairly straightforwardOne thing I really don't like is that the Radius feature, which is why we chose this device over similar ones that didn't cost as much, requires that the app be actively running on every device it's installed on, or it won't work. It's not enough to have it installed, it has to be running. Basically, you have to choose between saving on heat and saving your cell phone battery.Overall, it's good once you get used to it; it's really nice to be able to change your heat settings when you aren't home or aren't near it, but you almost need to use the app for most features on the thermostat. It's too complicated not to.

It's no NEST, but it will control a millivolt system (simple gas or propane furnace that operates without outside power). I have that in a pair of vacation cabins. I installed the CT50 in one, and after a few weeks of shakedown, installed the second. Looks like they reduced my heating bill substantially--perhaps enough to pay for themselves the first year. These are mountain cabins and if nothing else, these thermostats will hold the temperature just above freezing, 10-15 degrees colder than the manual ones they replaced. After the second installation, both thermostats show up on the Radio Thermostat app on all family iPhones, where they can be easily monitored, adjusted and programmed. Since these are vacation cabins, the "Away" setting is much appreciated. Same functionality, different interface is on the website. Indeed, it's far, far easier to control these with an app because the panel on the thermostat itself is hard to read and hard to use.Setup is not plug-and-play. While the box includes hardware installation instructions (and that part is very easy), the networking instructions are online only. Those steps are complicated enough that I recommend you set aside at least an hour for programming.And, since I mentioned the millivolt capacity, rare among WiFi thermostats: If you have a millivolt system (or no "C-wire") you'll have to buy a separate A/C power supply (about $20) and wire it in. WiFi won't run on batteries alone. A bad power supply was my biggest initial obstacle. Fortunately, their customer support is very good, and a tech quickly helped me troubleshoot the problem.I could've gone with NEST, but would have needed an electrician to rewire the system to a higher voltage. This works fine.

It works great. The app is useful and makes programming it easy. It's somewhat non-intuitive to program without the app. It was also a little tricky to setup. I misrembered my wifi password. It failed to set up without giving me a clue why.On nice feature of the app is that it keeps track of when your heater has run. It also graphs the tempersture. The only problem is that the temperature range is fixed and doesn't go low enough for my minimum temperature. I'm using it to control the heat in a workshop. I allow the temperature to go to 45 at night just to keep the pipes from freezing. It is also handy that you can override the setting remotely and prevent the heater from coming on. I didn't use the shop today, so I didn't need to heat it above the minimum.I am using it just as an on/off control for a heater. It can control an air conditioning unit as well. All in all I find it to be a useful gadget for my application.

I had an old Honeywell thermostat on this house I purchased last year. It was programmable, but was a pain in the neck to set up. So after I got my Amazon Alexa, I checked out the Amazon website for a reasonable priced thermostat that would work with an Echo. This Honeywell caught my eye, so I read the reviews and decided on this one. Since someone mentioned in their review that the warranty would be compromised if it wasn't installed professionally, I paid my H/C guy the $60 that he wanted to install this when he came for my yearly system checkup.It is a really nice thermostat. It gives your local weather conditions, temps, humidity ( inside and out) and time. You can change the color to suit your taste. Not only does it work with Alexa--it also works via your downloaded phone app. Yes, if you unexpectedly discover that you'll be gone most of the day, you can change the settings through your phone app. Convenient!The only reason I dock a star in the rating is because for some reason, in the middle of the night, the screen gets light enough to act as a nightlite. I don't know why, but it is a little irritating. Other than that, operation has been flawless for over 6 months now.

Looks good, easy install even if you do not have the proper "C" wire but the "smart" recovery mode never really learned to time the furnace to reach the scheduled temperature. In fairness, our weather and the resulting ambient temperature has been very volatile this winter. But furnace would frequently fire to early, sometimes by over an hour, and the temperature would exceed the scheduled temperature both in time and heat by a considerable margin. We finally resorted to turning off the "smart response mode" and just use the thermostat the old fashion way. At least we have wifi access (which we will probably never use) and it displays the outdoor temperature with an additional component. I was also disappointed that it does not integrate with our second furnace system using Honeywell's zoned wifi system other than through the Honeywell server portal. I had anticipated using our Honeywell remote thermostat to control and monitor both furnaces and their zones. In summary, the stat could be smarter and more integrated with the current Honeywell products.

This was a great buy. It cost 200+ in the store so the price is great. I picked this because I wanted wifi, app enabled thermostat. I did NOT want the stupid AI Nest crap. no thanks. You can get cheaper wifi but I paid extra for the nicer looking design and the weather integration. It was very simple to install and connect to my router. I reduced it 1 star for the following 3 reasons.1. The tabs on the wire connectors were flimsy and 1 broke off exposing one of my wires during install. In reading the manual afterwards it does specify to ensure your wires are perfectly straight before inserting them so there is a warning. Be sure to follow this and you will avoid my mistake. It did not impact operation at all just annoying.2. When it disconnected from my router 1 time in 3 months of owing it, it did not recover gracefully. I had to delete the connection and make a new router connection.3. there is a slight delay in the touch screen responsiveness. Enough to be annoying but not a gam changer since I use my phone mostly.Overall its a great product and I will be buying a second one for my downstairs. I wanted to test this one before buying both. I would reccomend this over the more $$ Nest anyday.

Love the T-stat, it connects easily, and I didn't need to do any fancy port forwarding etc for my router to get it to work. It controls it reliably, or at least it has for the past 2 days.I took off a star for 2 issues with installation.First, the snap-in connectors I'm not a fan of, personally. Being on both sides (a left and a right) inserting the wires definitely needs some needle nose pliers. I prefer the screw in terminals. Having to relocation this thermostat I fear those small snap in connectors will wear out. Hopefully any replacements would be cheap (if ever needed) since it's just a back plate. Also, be sure to cut back your wires if your t-stat wire doesn't have room to move into the wall. Mine was stapled tight on the other side of the drywall, and if you have the smallest amount of excess wire, the tstat will not snap on. I had to re-do the installation after cutting an inch off of each wire.The 2nd issue I have with the installation is that they don't describe the wires very well, just the colors. One connection is O/B-W, and if you have an orange, a white and a blue, this was confusing. I wish they would say "the O/B/W is for the reversing valve". Installers will know this by heart, but going from a Bryant tstat to this, I wanted to make sure I got it right, and I had to do my own research. For those going from Bryant, my experience was that O/Orange goes to O/B-W and the W/White goes to W2 (emergency heat).I would buy it again, and plan on buying more for a vacation property I have.FWIW, While on vacation this week, I was able to remotely program it to stay at 80 degrees cool until 3am and then go down to 75 until 6am, then back to 80. I did this rather than the vacation mode because it allows my system to "bank" the cooler air when it's cooler outside and run at peak efficiency, hopefully reducing the amount of run time during the hottest part of the day. Since I can put the system back to 74 when driving home, the "vacation mode" doesn't appeal to me.Note to Honeywell, I wish the vacation mode supported that economy method I used (bumping down at 3am for 2 hours).

The bottom line: the thermostat works perfectly well, but installation can be tricky, at least for an older Water Furnace geo-thermal system. Water Furnace has an internet connected system for its newer units, but nothing that can run an older unit. I had read of horror stories with trying to use Nest on geo-thermal systems and this thermostat was recommended by a geo-thermal installer/consultant. "You can do the wiring yourself," he said. Wrong: one look at the way the Water Furnace displays its wiring scheme was enough to convince me to hire a professional.And here's the lesson: I hired the same company that had installed the geo-thermal system for the previous owner 13 years earlier (the consultant was based much further away). Truthfully, I was uneasy when I asked the technicians who showed up told me neither had installed this thermostat before. About an hour after they finished and departed, I realized I could not lower the settings -- or even turn off the thermostats (two zones). Nor did the company answer its phone (1pm). A recording provided an "emergency number" -- but its mail box was full. I called Honeywell customer service and a 30-minute on-hold wait later, got connected to a rep in, I believe, India. That's OK. Except the phone line went dead in middle of the call. All I had learned to that point was that if one removes the digital face of the thermostat (like some old car stereo units) it shuts off. To skip ahead several days, I got the consultant to come down and reinstall the wiring and settings...all seemed to be working fine, except...Lesson 2: Be careful with the digital face plate. This thermostat has a base that is screwed to the wall. You attach the various wires to terminals on this base plate. Then the digital face just "snaps" on and the thermostat comes to life. YOU MUST BE CAREFUL ON HOW THIS FACE 'SITS' ON THE BASE PLATE. There are perhaps two dozen tiny pins that must be carefully aligned and pressed into place. Unfortunately, one of the pins got slightly bent and didn't connect properly. The thermostat worked, except the supplementary propane boiler would not kick in (all geo-thermal systems have, or should have, a "supplementary" system). Yet another call (and fee) to a third company fixed this problem.Now that the installation is correct, I find the thermostat works flawlessly. I can control and program it from the free app. The daily and weekly programming is the easiest I've encountered. The Internet connection has worked more or less flawlessly.I'm rating this four stars because I believe the installation headaches, while partially self-inflicted, shows just how complicated it can be to wire up correctly -- at least for an older Water Furnace geothermal system.

Unlike the older thermostats which are battery powered, the Honeywell RTH9580WF WiFi 9000 needs the "C" wire to operate. The "C" wire provides the needed power. For full functionality the wire between your HVAC unit and the thermostat needs to have 5 wires (C, R, G, Y and W) That is for a conventional gas system for heating using forced air and AC. For other systems, such as heat pump, check the manual which can be downloaded from the product page on Amazon or from Honeywell.If your wiring does not have 5 wires and you do not want to go thru the expense of pulling a new thermostat run, you do have a few choices:1. Reassign one of the existing wires to be used as the "C" wire. This will lose some of the fan control options.2. You can use the Venstar ACC0410 Add-A-Wire for all 24VAC Thermostats.3. You can use the Honeywell THP9045A1023 WireSaver Module for Prestige Thermostats.The third option seems to be the best. The cost of the Honeywell WireSaver Module is about half of the Venstar Add-A-Wire and it is a cleaner, more elegant installation.Now, if you read the User Guide for the thermostat you probably noticed in a few places where it says "Do not use K terminal. For future use". That statement is probably true for older versions of the thermostat and/or its firmware. Honeywell Support confirmed that the RTH9580WF thermostat will work with their WireSaver module which uses the "K" terminal.The only thing you have to make sure is that your heating/AC appliance's control board does provide the 5 connections needed (C, R, G, Y and W). I suppose that some older system may not provide all connections.The installation using the Honeywell WireSaver is straight forward. The attached pictures show it all.The RTH9580WF thermostat has all the features I need and then some. If you create an account on the mytotalconnectcomfort website and add the thermostat there, your thermostat will receive software updates as they are released by Honeywell to fix bugs and hopefully to add features. You can also configure to get email alerts and you can make changes to the temperature settings, fan settings and you can even edit the schedules. This comes in handy when you are not at home. Even when you are at home, it may be more convenient to make schedule changes on your computer instead of the small touch screen.You also use apps for your iPhone or Android phone. I am using a Lumia 950 (Windows 10 phone) and Honeywell has no app available. Also I am not aware of any future plans for such an app. Not a big loss though since I can access the mytotalconnectcomfort website using my Windows Phone the same way I do it on my computer.The only thing I find missing when I compare the RTH9580WF thermostat with others is the reports. It would be nice to be able to get reports about the power usage and savings via your email. These reports would add the 5th star.This thermostat works great for me. I only installed it about 24 hours before writing this review so I have nothing to say regarding the long term operation. However my past experience with Honeywell products was great.

I bought this in conjunction with a new furnace. The install was very easy and I had this wired in less than a minute. It was up and running on my network in about 5 minutes. The biggest pain is the setup on Honeywell's website. It would be nice if the registration was quick and easy but they require a lot of information which drives me crazy. That being said the app was simple to install and setup. The integration with my Amazon Echo wasn't as easy as I thought it might be but again, these parts of the setup don't impact the basic usage of the thermostat. So minus one star for the app/web configuration part of the install.

The one thing I don't like which is why knocked off an extra start is the temperature is off by 2 degrees. When the thermostat is set to 72 degrees my old thermostat, as well as two AcuRite thermometers/humidity monitors I put in the same room read 70 degrees. The humidity guage is also off by around 8%. It really doesn't affect the furnace operation and is more annoying than anything else so I'm pulling a star on this review.

Disconnects from SmartThings about once a month. I purchased this thermostat because I preferred the aesthetics over others on the market. However, about once a month (because of software updates I presume) it disconnects from SmartThings and I have to go through the painful process of reentering my Honeywell login information to get it back online.

Additionally, as other reviewers have mentioned, the mounting bracket is poorly designed. You have a 50/50 chance that your thermostat will hang loosely because the bracket doesn't grab the thermostat well enough.

Fancy version of a standard stat. Wish I would have bought the Nest as it does metering, motion, phone detection, etc to truly drive cost savings. This item just gives you remote access to the unit nothing more than that in my opinion.

I should have looked at new Nest reviews, since the updates and changes that product is solid. Three of my friend have it now and it is 10x the product this is.

Easy to install, requires common to be hooked up to power it. Had to dig that out of the wall as many stats do not require the common to be used (including the Nest).

I will be moving this stat to the other zone and adding a Nest to my main zone. They wont talk but that is fine as the secondary zone doesn't run much in this house.

I researched the thermostats to death. I had no reason to replace the old Honeywell thermostat that came with my house. It looks like it is the original thermostat that came with the house when it was built 30 years ago. So in my research I considered the Nest thermostat (and I really wanted to get it), but I settled on the Honeywell mostly because I wanted the option to set my own schedules rather than have the device "learn" what I like.

I purchased the Honeywell 9580 in June 2015. I promptly installed it on my wall when it arrived to replace the original Honeywell unit that came with my house. We added the device to our wifi network. My SO and I then downloaded the "Honeywell Total Connect Comfort" mobile app, configured the account, and created our schedules from the app. At this point there was no reason for us to ever touch the thermostat on the wall again.

In fact, we didn't touch the thermostat after we had the mobile app working. We enjoyed the ability to adjust the temperature, power state, and schedule of our fancy thermostat from anywhere. Hell, we even turned it off and on from the airport when we were going on or returning from trips! It's wonderful to come home to a sufficiently cooled/warmed house!

Then the problem arose.

One morning (Jan 2, 2016) I came downstairs to find the the color scheme had changed on my unit. I had asked my SO if she had changed it, but she said she hadn't. I tapped the screen to change it back to the color scheme that we prefer. To my surprise, it changed back to our color scheme immediately when I tapped the screen. Odd? I went about my day.

Later the same day I received an alert from the "Honeywell Total Connect Comfort" app stating that my Honeywell device was no longer connected to the internet. Wow! I'm impressed! Great feature indeed! So I wander over to my thermostat and discovered that the screen was black. Very odd. I tapped the screen - nothing happened. I tap the screen again - still nothing happened.

So then I called Honeywell Support. They had me pull the thermostat off the wall and check the circuit breaker and also check to see if there is power across a couple wires. The circuit breaker was fine. There was no power across the lines. Honeywell Support then told me to contact HVAC to find out what's wrong with my furnace.

I contacted a local contractor service which came out the following day. They "jumped" my thermostat, installed my old thermostat back on the wall, and told me that one of the transistor caps is damaged on the fancy Honeywell 9580. Sure enough, it fell out just flipping the thermostat over.

We called Honeywell Support again to report that the device is still not working after HVAC checked it out and that one of the transistors is now "broken". Honeywell Support essentially blamed us for the physical damage and explained that they would not honor their warranty as a result. We explained that the thermostat worked perfectly for the 6 months that it had been on the wall and the only reason it was off the wall was because it STOPPED WORKING and a HONEYWELL SUPPORT REP instructed us to take it off the wall. So how does it get damaged sitting on a wall for 6 months? Honeywell provided us with the email address of a "manager" named Paul Arntzen (case # 00168634) and instructed us to take pictures of the device and email that "manager." We emailed Paul on January 4th. We received no response. We emailed him again on January 8th. As of today (January 16th, 2016), we still have not received any response.

IN SHORT
The device worked perfectly for 6 months and we did love how it worked. However, due the to crappy support from Honeywell, we will not be purchasing Honeywell products anymore.

EDIT
We eventually did get it replaced for free, but it took at least a dozen emails and several phone calls. YMMV. The way that we got results was that we used the "feedback" option on Honeywell's website. Someone got in touch with us, provided us with an email address of a manager and asked us to send pictures of the device and details of our story. We did. Someone responded and asked for our address. Shortly thereafter a brand new device arrived at our door. We put the new device into operation and it has worked without issue thus far. We kept the original Honeywell thermostat (30 years old and non-digital) just in case we get a repeat issue. I ended up selling the old broken thermostat on eBay for a decent amount of money - the person who bought it apparently fixed it and he is happy with it. Changed from 1 star to 3. I can't in good conscience give this a 5 star rating due to the customer service.

If you have a Gas Furnace with Hot Water Heat -- BEWARE -- nowhere will you read this on Honeywell's website, however you will require an alternate 24v power source (not run off the furnace). Why? Because the Gas Furnace will briefly power down when a "call for heat" happens. This reboots the thermostat. Called Honeywell -- They knew about this problem immediately -- get calls all the time. However, you need more than just the "C" wire to solve this problem. You need to run a 4th "RC" wire, and go buy a 24v transformer to power it. This was a very bad decision by Honeywell not to tell people about this upfront. Luckily I ran 2 extra wires, but if you run just a C wire you will be quite upset to find you will need another wire run. Honeywell could have added a $1 capacitor to the design to solve this problem, however why do that when they can have me run more wire and buy a $20 transformer.

Also, for those thinking this will capture utilization metrics, like "hours on per week", or an activity log of some kind. Nope. A $200 thermostat that looks pretty. Guess I'll have to contact the NSA to get that data.

This thermostat has one fatal flaw...why have a smart thermostat if you can't control it remotely and locally both? This thermostat allows one or the other but not both! I confirmed with the manufacturer that if I turn on the Z-wave control I can no longer modify the programming locally...UGLY.

I've owned one of these for several years. I'm so frustrated that I'm taking the time to write this review. YOU'D BETTER HAVE APPLE PRODUCTS!!! They snub Android and now I find it doesn't / can't work with Windows 10. No development apparently for anything past Windows 7. Configuring WiFi is a real pain even with Windows 7 or below. What should be simple is outrageously difficult. This thing should self configure by using DHCP. How hard could that be? Instead configuration requires that it set up its own Wireless Access Point and is only usable by Windows < 8 or Apple Products. If you have Android or Anything more modern than Windows 7 good luck! Let me know if anyone can configure this for WiFi by using Windows 10. You then need to connect to its configuration network and setup the actual WiFi setting that you want. There is NO WAY TO DO THIS ON THE THERMOSTAT ITSELF which is RIDICULOUS for such a sophisticated little device with touchscreen. Once configured (assuming you can get past that hurdle) it will work pretty well until some kind of glitch scrambles the WiFi settings at which point you'll need to re-embark on the highly frustrating and arduous process of re configuring WiFi all over again. Another thing is that if the temperature is in the automatic mode (Hot / Cool to a temperature range), One cannot perform a temporary override. One must set it to Cool or Heat and take it out of automatic mode first. Another issue is the time it takes to sync with the cloud. What I do like (hence > 1 star) is the History that it provides concerning run time and also temperature setup. Another downside is that I've noticed that temperature must be at least a few degrees outside of tolerance before it will activate heating or cooling. So the range of variance ends up being larger than what one specifies. I really wanted to like this product. I spent a lot for it. So close to greatness but just misses it on configuration and tolerance. I look forward to replacing it as soon as I have the chance. Perhaps with something that works with all WiFi products and not just Apple. And perhaps one that can anticipate time to ramp up or down to a temperature. -- Another FYI: It DOES have an Android App. But this can only be used to control the temperature. It DOES NOT allow for configuration of WiFi which needs to be done with Windows < 8 or Apples Products.

While I like the concept of this programmable thermostat a lot, I am going to downgrade it to two stars for a couple of reasons. First let me say I own 2 of these and have had similar experiences with both of them. And second, I am speaking as a professional software engineer who knows a LOT about how to design good user interfaces. First of all, the touch screen on the unit itself is very problematic. Many times when I go to touch a control icon it does not respond. Trying to change the temperature up or down requires many touches of the up or down arrow before it responds. Much of the interface is non-intuitive and indicates there was a lack of use case studies, with real users, before the layout of the controls and menus were designed. Same thing can be said about the app that goes with my Android phone. There is no clear way to discover how to navigate around and get to the various setups and menus. I have two thermostats for example, and though I know it is possible and have done so, I still have a great deal of difficulty just figuring out how to switch between the controls to interact with either one or the other. Much of the user interface is simply NON-INTUITIVE! Third, many of the links and features of the app are actually broken and do not work. Try to send the company feedback for example, they do provide a "link" but it is useless. In the 2 years that I have owned these, I have not seen any updates or notification that a new version of firmware is available. That strongly indicates that this company simply does not care about it's customer experiences with their product and is making no effort to ensure that it is a high quality device. So overall I would have to say my user experience with this device has been extremely poor. On the plus side, once you do manage to get it set up and working, then it seems to work fairly reliably, so I am giving it 2 stars, because it at least does work...

Good thermostat once installed. NOT USER FRIENDLY IN THE LEAST TO INSTALL!!!!! Im an engineer with a masters degree. Short of enilating this unit i called customer service twice. Each time I was treated as if it was a major imposition tohave too speak with me. Two different representatives. After a half hour the unit worked well. Using it with vera edge was effortless and i like the unit now that its installed. I would not ever inconvenience the company again with any additional purchases however.

This is the first of two Radio Thermostats I've purchased, the second being the CT80. Both are fantastic at what they do when they're working but you definitely get more value out of the CT80 than you do with the CT50. First, here are a few things they're both good at:- WiFi control: It's a glorious thing to be able to turn on your A/C or Heat from work if you know you're getting home early or to set your thermostat to "away" from the airport if you forgot to do it before leaving for a trip. This translates into dollars saved by not conditioning an unoccupied house. The initial setup can be daunting but once it's up and running, using this via WiFi is a breeze. If you have the App (I use Android) and you're hooked into the same WiFi network as the thermostat, you can communicate directly with the unit for near-instant changes. This is magic on cold mornings that you wake up early and want to warm the house before experiencing the world... The only times I've ever had problems are when my WiFi network goes down at no fault to the unit. It'll continue with whatever program it was running with so it's not that big of a deal- Web analytics: Using their website, you can track when your thermostat turns on and see what your usage habits are. If you're a nerd like me, you can download months of data to an excel file and crunch numbers for whatever purpose you want, hoo-ray! If you're only moderately nerdy, you'll still enjoy the visually appealing and understandable graphs that the website provides showing your usage statistics and how you rank in efficiency compared to other house around you- Program customization: You get to set 4 temperature changes for every day of the week rather than a "weekday" and "weekend" schedule. Also, the App is VERY intuitive and perhaps easier to use than the website. It's well designed for touchscreen control****There are several things that the CT80 has going for it over the CT50:- Buttons! The touchscreen on the CT50 is a pain in the ass. Thankfully, I rarely used it but it's WAY easier using the actual buttons on the CT80 to change temperature. I literally used to pull out my phone while standing eye-to-screen with the CT50 rather than have to deal with touching it...- Circulation: To my knowledge, the CT50 does NOT have a "circulate" option. With the CT80, you can turn on "circulate" and it will activate just your HVAC fan about once per hour. This comes in handy if you want to try and keep the house a uniform temperature or, during seasons where the HVAC is rarely used, to keep rooms from getting musky.- Way more options: The CT80 seems to be able to control just about everything in the house. I'm a little worried it'll go sentient and suck all the air out of the house while we sleep. But seriously, it can control active ducts, multiple heat pump stages and other "auxiliary" unmentioned things in case you find an unusual need to expand. It's actually more than I need but it's nice to know I have this capability if the desire arises.- And even more options: The CT80 allows you to set how big of a difference the temperature should be before initiating a heating or cooling cycle, unlike the CT50 that is defaulted to 1 degree and cannot be changed (to my knowledge). If you want to decrease the number of daily cycles of your HVAC system (thereby extending the life of your equipment), this can be a very useful feature!*****There are a few things they're both poor at:- Wiring: Make sure you've got some tiny needle nosed pliers and a lot patience. Both units inevitably hide wires quite well if done correctly but "correct" means snaking itty bitty wires through itty bitty slots without breaking them... I almost gave up and just let the CT80 dangle from the wall- Unit mounting: Make sure you've got a skinny phillips head screw driver and don't forget to limber up your wrist before using it here. The screws used to mount these units to the wall are about 2 or 2.5 inches long and must be slipped into a hole just wide enough to fit the screw. Once mounted, these things are sturdy but getting there, especially after having to wire it, will test your nerves.- WiFi setup: The CT80 seems to have gotten a bit easier to setup but this is a review for the CT50, isn't it? FAIL. It was a device designed for use with iOS devices and IS NOT SUPPORTED on Windows 10 computers or Android. AFTER its setup, you can control it with a web based application or with an android app... good luck getting it to that point.I used to recommend this brand but the WiFi setup has pushed my patience too far. Do not buy the CT50 if you're looking for an easy wireless thermostat

(See update at bottom!)I work for an automation company, and have been automating my home a little at a time. I thought about making my own thermostat, but the CT50 changed my mind. By itself, it's a fairly easy-to-use programmable thermostat, but in back, it has not one, but TWO slots where wireless cards can be plugged in. It comes with a Radio Thermostats of America Wifi module already plugged in, with room for another module; there are a number of modules available, (Zigbee, for instance). Here's the score, (IMHO):Cons:First, as noted by several other reviewers, the wifi requires a strong signal. Even a 10-foot increase in the distance between my Airport Extreme and the thermostat resulted in a significant drop in signal strength. Worse, if the connection is lost for any reason, the CT50 almost never reconnects, requiring a complete reconfiguration as though you had just installed it. I don’t understand why that is, when even a cheap $40 tablet is smart enough to automatically reconnect to a network it recognizes, and I chopped off a star for that utterly mystifying shortcoming. Even a tiny power glitch to my router would cause the connection to drop; I solved that by putting the router on an UPS, but that shouldn’t be necessary!Second, the touch screen isn’t the greatest; sometimes you really have to crunch it to get a response, while other times, I was able to accidentally trigger an item on the screen.Third, the manual is not always accurate. In some cases, the screens shown are somewhat different from those on the thermostat; in another case, the manual says when you want the Program screen, “Press PROG for to access it.[sic]” The picture they show, however, is of the Manual screen; it took me a while to find where the pictured screen was actually located.Fourth, it has a filter reminder, complete with a little red LED that lights up, but the reminder seems to be nothing but a dumb timer that triggers after a pre-set number of days or hours have passed, regardless of whether the fan has been off or has been running 24 hours a day. My previous thermostat had a timer that kept a total of the hours the fan had actually run, and reminded you accordingly; I had to roll my own timer to get this seemingly obvious functionality.Pros:Now for the good. First, I don’t even know how difficult the thermostat is to set up on-screen, because I used the recommended method of connecting my iPad to the thermostat’s built-in Wifi network and using a browser to configure it. It’s quite simple, and uses a 5-digit security code, displayed on the thermostat, that you must enter before it will connect to your network; this is a simple but effective way to prevent an outsider from hijacking your thermostat. When configuration is successfully completed, you’ll see a blinking green LED and hear three beeps, at which time the thermostat displays the last “quad” of its address on your network so you know how to access it, (most home networks use an address scheme like 192.168.1.xx, where the “xx” is a number from 0 to 255; each value is a “quad”, so if the thermostat shows “22", its address is 192.168.1.22).Second, you have four time zones per day, times seven days, each with its own start time and temperature, with separate setting for heating and cooling. You also have “Hold” and “Holiday” for those out-of-the-ordinary days.Third, it is cloud-capable, but not cloud-dependent, so you don’t have to worry about it becoming a brick if the cloud site is ever gone.Fourth, (geek alert!), it has a REST interface, with a very well-documented API so you can program it with JSON strings...which is what I’m doing, via an automation controller. It is sooo flexible! I have screens to read it, program it, turn it on and off...anything I can do from home, I can do from anywhere I have internet access, even from my smart phone. In other words, the future I heard about while growing up is finally here.Summary (with update):This device definitely has some quirks, and has room for improvement, but for me, those were at first offset by its capabilities and price. After months of living with its constant disconnects, however, I've changed my mind. It's not worth the hassle, and I can't recommend buying it, unless you happen to have a wireless g router just for this device.Update (06-15-2016):This is a bit sad. The thermostat has so much going for it, but the radio module has absolutely gotten under my skin. After countless disconnects from my very capable WiFi network, I have grown weary of its quirks, and have started replying to all of the "Your thermostat is offline!" emails I get as a result, (and there are plenty of them). I heard back from the radio module manufacturer, who basically gave me instructions to turn off any feature of my router that involved any improvement made to Wifi in the past decade, setting its capabilities back to about 2005. To me, this is absolutely unacceptable. Why should I have to cripple my wireless to accommodate a single device that itself should have been updated years ago, especially when it costs the same as a modern device does? I hate to say it, because I loved this thermostat's capabilities, but the radio module is an absolute deal killer. I'm leaving two stars for its promising design, but deducting 3 stars for its unforgivable outdated radio module. I can only hope that some day there will be a radio module worthy of the thermostat.

I have owned this unit for less than two years, and it recently began reporting our indoor humidity quite inaccurately (6-8% lower than actual level). I contacted Honeywell customer "service" and received this reply:

"RTH9580WF does not have the feature of controlling humidity from the thermostat, it just displays the humidity settings on it. There is no option to calibrate the humidity settings on the thermostat. This thermostat can display 5-6 degrees off when compared to a hygrometer.

You may get the unit replaced from the place of purchase, however it will display an off of 5-6 degrees."

Be advised, it is inaccurate, and Honeywell will do nothing about it.

I purchased this item in April 2015. It worked great, I loved using the app to change the temp settings. One of the reasons I bought this particular model was because it had a lock screen, so I could try to keep the teens in my house from changing the temperature (all claimed it wasn't them that changed it). That feature is very poorly done, very difficult to unlock the screen when needed, then you have to go back in and change the settings again to lock it. Better would be to unlock it then have it time out after a few minutes.
Anyhow, I was still happy with my purchase, and even bought another Honeywell thermostat for my downstairs, though not this model,just a basic wi fi model, so I could control my whole house with the app. The basic model is about half the cost of this one, and does everything this one does, with the exception of the problematic lock feature. So it doesn't have the fancy touchscreen, not really necessary for function.
Anyhow, just a few months after I purchased the second thermostat for my downstairs, this one just failed. Unfortunately, the 12 month warranty is 5 months expired. I am not sure what actually failed in it, but it would turn on the compressor when the air should come on, but then it would turn off again just a minute later. Using the downstairs unit the compressor would stay on as it should. I confirmed that it was the thermostat and not something else by re-installing my old basic thermostat that I had kept. Things worked perfectly with that thermostat installed, so not my HVAC unit.
This is a lot of money for a thermostat for it to last less than a year an a half. Now I'm upset I bought another of the same brand for my downstairs, as I was trying to avoid using two different apps to control my two units, but I can't bring myself to purchase another Honeywell at this time. Maybe I'll get a Nest.

Bought this unit to replace an older Honeywell Wifi thermostat because I wanted scheduled fan control times to circulate the air. Install was a breeze (although paint and drywall touchups were needed; this unit barely covers a 1 gang box) due to already having the correct wiring.

The touch screen is a bit annoying .. using the back of a pen or a key is much easier than trying to use your fingers sometimes.

Biggest complaint is the temperature sensor. As other reviews have noted, it's a bit schizophrenic. It's also very slow, or very fast to respond. In most cases, you will experience a 3-5 degree fluctuation in the room temperature before the sensor even registers a 1 degree change. If you can handle that, then this product might be for you. If you rather have a thermostat that works but doesn't look as pretty, check out some of the older (cheaper) Honeywell Wifi Tstats.

I have 2 of these, and they behave the same. I have several older models also installed in other buildings which are much more stable on the temperature readings, resulting in much better climate control. The lack of stability isn't awful, just annoying. I'll keep using these because the scheduled fan control is an important feature (which I'm sure they could add to their older models, but they'd rather force you into upgrading to a far less superior unit).

Purchased the Honeywell Wi-Fi Smart Thermostat in January of 2015. Worked fantastic for 9 months then my spouse reported that the display was blank one evening while I was away ... sure enough I could not connect to it via my smart phone during this 'outage'. A few hours later the unit came back to life - no explanation for the system outage. During this time, the thermostat is unresponsive ... so temperatures in the house start to get uncomfortable very quick. It's been doing the same thing for several months now ... sometimes it blacks out 3-4 times a day while other times it seems to work okay for several days in a row. Very disappointed with the fact that I cannot return the item even for a partial credit. Something is certainly wrong with it ... I've reset it by removing it from the wall ... no help at all.

Well it worked great for just over a year. Bought it in January 2014 and it stopped working today, April 11 2015. It has a 1 year limited warranty so its out of warranty, but it states, "This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of the consumer." Honeywells customer assistance definition of that is once you buy it, install it, and it works, warranty is void.

For the most part though for the last year my bills have been almost $30 to $40 cheaper this past winter than last. Never went a summer without the Honeywell in this home so I have no comparison there. It does what it is suppose to do, but mine pooped out just a couple months after the warranty. My problem was that it would not turn the furnace on anymore. It would work with the AC and the fan. I put in my old thermostat that I still had luckily and it works just fine. Put Honeywell back in after that, and it wouldn't work.

Research this carefully! I bought the first over two years ago and after a struggle with a bad radio module got it working despite poor technical support, this has worked fine since. I bought a second last November and once again after a struggle getting it set up it worked fine. My gmail account was compromised last week and I started changing all passwords, the Filtrete site was one of them.I changed the password online but afterwards could not log in. I requested a password reset but the email I received said the reset failed because the email address they had just sent an email to did not exist in the system. A phone call to customer support tells me I must now pay for support as the product, and apparently web site support are discontinued.The only reason I bought these were to control them remotely but I assume that is no longer, these look cool but apparently no more functional than a $20 generic thermostat from the hardware store if I can't get a hint on how to "reconnect" to the Filtrete "cloud". 3M needs to stick with paint and tape and leave the new fangled internet stuff to someone else.

This is the 2nd CT32 that I ordered - both are missing the z wave module. Returning again

Nearly impossible to set up and development is dead. I wish I would have read the comments section a little bit more. Could not connect with windows 10 pc or an android phone on marshmallow or an android tablet with jelly bean. In fact the thermostat wouldn't even show up.

Terrible/abbismal product support. Aparent firmware upgrade killing the WiFi, no answers over email, phone calls hanging up after 20min on hold.

No warranty. I have 3 in my house, 2 have failed and had to be replaced.Good luck getting a warranty replacement, there is none. Yes they are cheap for Wifi, but they are expensive when you have to replace every 18 months.Experience...I've owned 5 of them, so quite a bit.

All my comments are "allegedly". SEE UPDATES BELOW 1/2015When these were Filtrete, they were amazing, now it appears they are junk!!!Let me preface my review by saying I've been in real estate rehab/investing and do 99% of my own remodeling work for over 30 years. We first installed a Filtrete version of this thermostat probably five years ago and it worked flawlessly until a power spike took out the outdoor unit and stat. We've put these in our primary and vacation homes to keep track of things and manage the HVAC.THE HUGE New problems with this CT50:- In less than a year, we installed two of these in a new home. One is less than responsive with the touch panel, the other stopped responding with the touch panel and had to be replaced. The HVAC units are one heat pump and one AC unit with electric heat.- Before the Filtrete version was ruined, all the sudden the online/app name we gave the thermostat changed - to Spanish - on its own!!! It was if someone else perhaps got the IP/stat address.- 12/10/14 we went to our vacation home where the Filtrete died and replace it with a new CT50e which is what was sent when I ordered a CT50 from Amazon as the seller. It worked manually, got it linked up, programmed and all was well. Until we left for ten days.THE VERY, VERY BAD !!!!!!(Using iOS 8.1.2 and the latest 4.0 Radio Stat/Energy Hub app)- We went on vacation, nowhere near either home where these stats are installed (two in one home, one in the other). We set them all on "HOLD" 55 HEAT to prevent any freezing. Then they started to all act crazy.- All of the sudden they would change status. I can't even begin to explain the changes. They would go from heat to cooling - like change to "COOL 64". They would do this independently. Once I checked and they were all set different, one heat high, one cool low, all kinds of crazy stuff. This happened almost every day so i would have to check and change them all constantly.- I contacted Radio Stat tech support and had to be called back since they were so busy. The agent had never heard of the issue, looked through my history (the code logs) and deferred the case to Energy Hub. I guess they do all their app development. Got an email back saying basically they could not resolve the issue.- I tried resetting the app schedules, changing them from "HOLD" to a 50 degree "AWAY" setting and they would still change on their own. Mostly in the early AM after midnight. The "RUNTIME" feature indicated that the units did in fact change and run for extended periods of time. I can't imagine what our power bills will be when we should have been saving tremendous amounts of energy.- THEN THE WORST HAPPENED. I checked the home with one stat and it HAD CHANGED ON ITS OWN and was set to 98 degrees "HEAT" and the app indicated it was 89 degrees in that home inside!!!! We have just returned to that home and the heat pump compressor will not work and the supplemental heat (strips) and fan are all that come on. We replaced the CT50e back to the original Carrier stat with the same results.I FEAR THIS STAT MIGHT HAVE DESTROYED OUR $9,000.00 UNIT.THE GOOD of the CT50- None.This is another example of an excellent product gone bad. This used to be an amazing product that all I told envied - and a lot purchased. I guess I'll have to switch over to the Honeywell.I'll confirm what the HVAC a people determine in a few days. I'll update this review with our findings.UPDATE 12/30/2014- The HVAC installer has confirmed that when the thermostat switched to "heat" and 98 degrees on its own, it destroyed our HVAC compressor from over use (heat pump).- The "usage logs" confirm the ALL of the stats I own (2 homes) have set themselves to heat/cold to extreme temperatures on multiple occasions by themselves. I have the screen shots to confirm this.- I have to install a new package unit HVAC/Heat Pump now at $7,900. They will use the new Carrier "top to the line" IP stat.UPDATE 1/13/2015- The two remaining stats (one home, two units) were working "BETTER" for a while and not resetting. Monday A.M. at 12:01-ish as usual they reset themselves. I found this out waking up freezing. Checked my iPad by the bed and BOTH stats set THEMSELVES sometime after midnight to "36 degrees - COOL" on their own and it was 54 degrees inside (had been 70).- Finally took them offline today by pressing "Menu" and the function under the radio antenna icon to unlink them from my router to not destroy my two other HVAC units- Will be following up with Radio Thermostat, the BBB and two state Attorney Generals.JUNK, JUNK DO NOT DO IT!!!!!!!!!

I don't know who else bought this thermostat but I am wondering if your unit turns off a random times and then turns back on. Mine is doing it but I can still use my phone to turn my heat on but it resets my schedule that I had programmed. Weird I know. But is anyone else having this problem?

This product has many nice features;
- It installed easily / instructions were great!
- It looks great on the wall
- It's easy to use

However, and this is a BIG and ultimately fatal however
- If the product looses internet connectivity, it may not, and probably will not, reconnect without personal / onsite interaction.
- This was confirmed with a call to Honeywell tech support

I purchaced this for a vacation home where I could remotely monitor interior temperature over extended away periods of time. During the last Honeywell initiated internet update, I lost connectivity and have never been able to reconnect, making this product useless. I have a Nest remote thermostate in our other home, and have never had this issue, even with internet outages. Unless you plan to always be present to reconnect your thermostat from time to time, I recommend you look at other brands

Update: Problem solved / replaced with Nest!

Note: I had requested to return this thru Amazon back in November, even though I could not do so until I returned to our vacation home in June. June was well past the allowable return period. I printed out the return label in November. Removed and returned the Honeywell product when we got back to our vacation home and received full credit. Amazon rocks! Why would you ever buy from anyone else!

This thermostat did not work - at all! It heated the house rather than cooled it. We tried it a few times and each time it was a bust! We had to put our old one back on. On a side note - the customer service was really good. And so was the return.

Very disappointed. It was awesome while it worked but it died after 14 months. Honeywell support was horrible and their response was to simply buy another one because "it happens". Well no thank you. Replaced it with Nest and so far I'm very happy. Especially since they have a 2 year warranty!

Worst customer service experience I've ever received. I was on hold for 45 minutes until I got a supervisor. I called because my unit broke and was still under warranty. I called once and troubleshooter with Honeywell's tech department and the unit still did not work. I called back this second time and was told I had to go through Amazon.com for the warranty. When I called Amazon.com they told me it was Honeywell. So I called back with Amazon.com on the line, which is when I was on hold for 45 minutes. They still haven't honored their warranty because they need me to troubleshoot it AGAIN! I'M GOING NEST OR ECCO NEXT TIME!! NOT WORTH MY TIME AND AGGREVATION.