Side by Side Comparison of: Honeywell

I love this controller so much, thanks to honeywell！ Seriously, unless you are looking for the futuristic look, why spend $300 to buy a nest? My home has two AC system, and I have replaced both thermostat with this guy! Here is why I like it:1) Super friendly to people who travel. App is easy to use and interface is very intuitive. You never have to worry that your home gets too hard/cold, or your utility bill exploded in extreme weather2) For landlords, you can control home temperature without having your tenant fudging with the temperatures while you are away3) You can set temperature schedule to make home environment more comfortable.Note: You do need to muddle through the installation process. We ended up tweaking a bit on my AC's circuit board a bit.... But overall it's well worth the investment!

This is my 2nd purchase of this wi-fi thermostat and I'm very pleased with the results so far. The first one was purchased about 2 years ago and was the typical $99 but the one installed today only set me back $79 BUT I was surprised that for the first time in probably 15 years of using Amazon, I was charged sales tax. That ride was bound to come to a stop sooner or later. Oh well, still can't beat the great prices and free shipping on most items and I'll continue to use Amazon as much as possible.Anyway, the reason you're reading this is to gain some clue as to what/how to get that dreaded "C" wire that is required to operate this device in wi-fi mode. I realize all systems/set ups are different but in my case, I did have at least 1 or 2 spare wires on the existing thermostat wire and was ultimately able to connect that extra wire to a 24V continuous connection within the air handler or heating unit, if you prefer. I'll admit, the one I installed a couple years ago was a real test of my wits and my will. Conservatively, if I count the time researching the internet and climbing in and out a dozen times to where the gas furnace resides, it took me about 4-5 hours...I know, ouch, but I've found the convenience of adjusting the thermostat from anywhere in the world to be well worth it, hence the 2nd purchase for our downstairs unit that was installed today. Redemption was had when I met the mailman today and had my new unit mounted, wired and working in about 30-35 minutes, start to finish! What was my secret? The set up was very closely matched to the work I did a couple years ago and with just a little luck on my side, I connected the extra C wire to the correct wire nut right off the bat. This unit is an old school hydronic system (uses hot water to provide the heat for the house) matched to a conventional AC condensing outdoor unit so I wasn't so sure but again, all systems go in about 30 minutes.In a nutshell, you have to connect that C wire, assuming you have a spare wire already in your thermo wire, to 24v continuous electrical supply in order to power and run this thermostat. I'm sure electricians and AC guys may find this amusing and could do something like this blindfolded but for a commoner (there's that C reference again), this was a major score to get this one running quickly. Love it!

For $84 and free 2 day shipping, this is the best WiFi thermostat for the price. I looked at all the expensive options, but I eventually chose this based on simplicity and the fact that you can do pretty much everything from the thermostat itself. I had a honeywell thermostat that looked exactly the same, except this one has one extra button. That one only gave me the ability for weekend and weekday schedule. With this thermostat, I can have a different program for each day. Just that alone is a major upgrade.The WiFi capabilities are much more than what I could ask for. Only gripe I have about the WiFi is that it is not dual band and only works with 2.4ghz networks. The app is simple to use and offers a few more benefits than using the thermostat on the wall. With the app, you can group days you want to have the same schedule and set them all at once. You can also set a hold for a specified amount of time. If you change the temperature it will say hold until your next set point. Then you can change that time to whatever you want. Then at the end of the hold it will automatically return to the schedule. It also works with Alexa once you have enabled the Honeywell Skill.Here are things that I don't like, but are not enough to take a star away.-There is no battery backup and it requires a C Wire. But since it's on WiFi, it will automatically set itself if you disconnect or if there is a power outage.-There are no reminders to tell you that you need to change your filter.-If you manually change the temperature, it will show "hold until XX:XX" on the screen instead of the actual time. They could have programmed it to also show the current time at the top corner or something.All in all, it is a GREAT thermostat. The WiFi capabilities are nice, and if you forget about the WiFi or the WiFi stops working, it's still a GREAT thermostat. If you don't need all the fancy features of the nest or ecobee, then this is the thermostat for you. I just want to be able to change my temperature if my schedule randomly changes, and this allows me to do that. I am more than satisfied.

I have had my WiFi thermostat online now for about two weeks. I am amazed. The setup was simple. The app for my phone is very easy to access and use. I live in South Dakota where it gets very cold in the winter - it is 2 below actual as I write this - and very hot in the summer 112 last July. We travel a bit and it is such a relief to put the system on permanent hold while we are away and as we return home kick the system back on and have a comfortable house to come home to. I am traveling 230 miles to home in the morning, when I am about an hour out I will release the hold and by the time I get home, the house will be right at 70 degrees. It is currently holding at 48 degrees.Of course I have not had the system long and if it fails or begins acting goofy, I will update this review. As of now, I would give it 6 stars if I could.DakotaHoneywell RTH6580WF Wi-Fi 7-Day Programmable Thermostat

I absolutely love this brand and this model of Wi-Fi thermostat. I have purchased 5 of this exact model off of Amazon and absolutely cannot be more pleased with the product, the price and how it functions. Number one the price for a Wi-Fi thermostat is normally much higher. I purchased these for around $85 and yes that should be a concern when most Wi-Fi thermostats are twice that. I think the biggest difference is that this model does not have a fancy screen with all kinds of colors and digital eye pleasing features. However not knowing in advance I thought this would be a problem. It is not because with Wi-Fi thermostats you will never stand in front of that thermostat again. Once you install it you will use your iPhone or other wireless device almost 100% of the time to program and adjust the temperature. I have several businesses with these Wi-Fi thermostats and one in my home. It is one simple app on my iPhone that I open and can quickly monitor, adjust and if needed make program changes to the thermostats. The functionality is wonderful, the ability to program and making temperature changes is so easy. I will definitely buy this again when needed and I highly recommend the Honeywell because number one the price is some competitive and number to the functionality is amazing. I did purchase a different brand and the install and functionality was much more complicated and just not worth the fun of having a different brand. So when needed I went back to the Honeywell.

This may not do as much as a nest, but it does what matters. It is a programmable thermostat that you can control remotely.As everyone says this requires a c wire. Mine did not have the wire and the existing wire was old and wearing out. Great thing is that the wire for my furnace is a simple run and replacing it was quick and easy. I do have some hobbyist experience with low voltage wiring so I was able to hook the new furnace wire up easily. Of course all situations will probably be different. I understand there is a workaround if you do not have a c wire, there is a drawback but it was not a major one. I do not remember the drawback.After it was installed all I needed was a smart phone or tablet to connect the thermostat to my WiFi. There was an update where the thermostat had to reboot but that is to be expected and welcomed with things like these. During the reboot the furnace unit shut off but only for a minute.TL;DR great WiFi thermostat, just check that you have a c wire on your existing thermostat or feel comfortable with wiring for a fix or workaround.

Love this item. The price was unbelievable on Amazon. What I like about this is: 1) The ease of setup and the fact that once you set up the schedule for one day you can just copy to all the other days; 2) the auto feature that follows the schedule to a "T" so that as the temperature changes between hot and cold, so does the thermostat--automatically between a/c and heat; 3) the energy saving aspect and that the LCD goes into power saving mode; 4) the ease of reading and understanding the LCD display. I am about the buy three more.

Excellent. Only minor quibble is even with constant power availability from the heating / cooling system, display won't stay lit like some other brands.Programming is easy to setup, and you don't necessarily need to use the 4 times of day the way they're labeled.I tried other brands with nearly identical functionality, but they went whacky with following programming (even rma'd).

Easy to install and program. We were replacing an older Lux thermostat so the install was a bit different. We called Honeywell support and they were a big help. After installing it was blowing warm air, so we called Honeywell once more and they helped again. They let us know since we had a heat pump we needed to program a code for the system to work. So far it has helped to regulate the temperature in our house. We have an older home (in Phx, AZ) and it seemed like the air conditioning ran all the time. It was nice to wake up and not have the air running in the morning.

Goes through batteries pretty fast but the way it handles temps seems to be more efficient than the last thermostat I had.I believe that we are seeing lower electric bills while having our AC 'on' almost non-stop this summer while having a colder temp setting vs the old thermostat.This is likely due to how it runs several short cycles to maintain desired temp vs allowing house to overheat then cool down past set cooling point.I.E. runs the AC a few times an hour for a short time to maintain temp vs running it a few times a day for several hours to attempt to control the temp.

Installation was straightforward. At first the process of programming seemed a little daunting. But once I figured that I have a pretty regular schedule throughout the week -- I get up at the same time, leave in the morning at the same time, come home at the same time, and go to bed at the same time -- it was easy to program. Easy to put on hold when out of town on travel. I'm happy with the purchase.

I replaced my 22-yr old Honeywell ChronoTherm with this more modern unit. My old thermostat worked as it was supposed to, but it allowed the temperature to swing about 2 degrees before activating. In the summer, I would be feeling overly warm and as I was about to adjust the thermostat it would click on. That was getting tiresome although I endured it for years.This new thermostat does not disappoint. It turns on the air just as I am starting to feel a bit warm and I like that. I don't know how it works in winter yet, but I have no reason to believe there would be any problem there, either.Some folks argue that having it turn on and off more frequently is a problem. I disagree. Those guys need to live here where it's over 98 degrees most of the summer and see if they mind the a/c coming on too often. Besides, I keep the temperature on 78 day and 79 night with the help of this unit and I can see that it is more energy efficient than the prior unit.Here we have "smart" power meters and I can check my usage every day. This thermostat has made a difference. Although the peak cooling season is right now (August) my heaviest usage days were all back in July before installing the new thermostat when it was actually cooler outdoors. Now I'm using about 5 kwh less per day on a 2-story 2200 sq ft home with single a/c and heat.Also, I never feel the need any longer to go and crank the temp down because I am feeling too warm. Do that in the heat of the day does cause a great loss of efficiency. So basically I am MUCH more comfortable which is very nice indeed.I really don't need the 7-day program ability or the vacation hold. However I did want the automatic changeover between cool/heat so my decision was clear. Also, I could not convince myself that any brand other than Honeywell would be a good choice since I know from experience they have a great reputation for making fine thermostats.Installation could hardly have been any easier. Setting it up was simply a matter of following the very clear Installation Guide. Almost all the options were factory set as I needed them except I turned on the automatic changeover. That makes no difference now, but later in the fall when we are still having 90 degree days and 60 degree nights it will be nice not to awaken in a chill.The lighted touch screen is nice, since my hallway is usually quite dark. Not a big deal, since other than to do a little fine tuning on the program I haven't needed to touch it. Yes, the light does turn off a bit quickly but I've learned to tap in a blank area of the display and turn it on again while I ponder my next move.This unit does not offer the option to be illuminated continuously. That at first annoyed me but to be reasonable about it, it only means that the light will not be deteriorating over its life and getting dimmer every year. It should last for many years (my guess) by turning on only when really needed rather than being an expensive night light.To wrap up, it's a great thermostat. I wish it would pay my utility bills but at least it is helping to ease the monthly pain by a dollar or two and the savings will add up. I like it.

Installed two in Les than an hour, work well.had to climb up to attic to turn off the power and connect the C wire. Setup takes a few steps, follow the instructions and be patient, you'll be fine.One of the unit had one loose wire socket, so one the wires is not secure but just sits there, may cause problems later on, too lazy too exhangeI've always had Honeywell in the past 20 years,they are basic features but reliable. That's what I like.Not getting those fancy smart device things, it is out of control, we will all be brain dead.

I ordered this to control a gas stove we put in our basement. I wanted a WIFI thermostat so I could remotely turn the heat up before we went downstairs for the evening and then automatically turn down at 10 PM when we go to bed. The thing I don't like about it is that you can't have the back light stay on all the time. I have a Honeywell touch panel one in the hall upstairs which controls the HVAC. That one you can have the light stay on.

As a control freak and someone who occasionally forgets to change the thermostat before leaving for the day, this was an affordable solution that works for my needs. Haveing a similar Honeywell unit previously installed - the wiring was nearly the same. The biggest headache came from the WFI setup and im a damn computer tech. The bottom line is there must be NO SPACES in you WIFI SSID. I didnt test underscore ( _ ) but my assumption is it will not work either. Also, do not use special characters in your SSID (!@#$ etc) as they really arent supported.Another thing I didnt see mentioned in other reviews that i saw is that there is no data logging - you cant see what the high/low was yesterday or anything logging/data anywhere. You are literally just getting a Wifi controlled thermostat and for MOST people this will be enough. Abrupt weather changes/changing while on vacation/ easier programming schedules -- great for those instances. This will be a temporary unit for us until we replace our heat pump and air handler. Then we will decide on new WFI thermostat since there are rebates available. Most likely will not be another Honeywell unless their higher end stuff provides more control/data (logging temperature, prevent emergency heat, estimated costs, etc). In the end, i got what I wanted - a wifi controlled thermostat to change when I forget too. Now that I have it - i now know I want more

Easy enough to connect (take pictures of the wires before removing old one) physically and then electronically to WiFi. Register the device with Honeywell and install the Honeywell app on your smart phone. Using the app (or even via the website interface) makes it much easier to modify the schedule. Plus, you can configure the device to send you an alert if the power goes out. It's hard to get excited about a thermostat, but this one worked where the Nest did not. We've got two of them and for much less than 1 Nest. The WiFi setup can be a bit daunting for those less computer savvy, but if you follow the manual it will work. One item of note, if you connect and then change your Wifi password or network settings - in the manual, it walks you through "forgetting" the WiFi settings so you can connect again. That is easier to do than setting it up, but you will need the manual to decode what the numbers mean.

I have only furnace at home (no A/C). There were three wires to my old thermostat : Rh, W and G. Rh was jumped to Rc, but probably not relevant since I do not have an A/C. I shifted G to C at furnace and used it for C at thermostat. WiFi setup was a breeze and I could remotely control the system now. 4 stars because of an issue with the website. I can't change the schedule online. It says "Schedule Loading It normally takes 10 minutes...." every time I visit. If it ever loads, I will update here. Let me know whether anyone else faces this issue.Update. The issue "schedule loading" persists. Customer support gave me two options 1) wait for a few more days or 2) a complex hacking/resetting method. I am not ready for the second method so I am still waiting. While waiting, I am giving three stars.Update (11/2015). Honeywell fixed the issue at server end. It works as expected on apps and websites. I recently had to change the wifi router password. Resetting wifi parameters is not straightforward - you have to press fan and up button and select item 39. I wish they explained this in the manual.

This is a great idea and, once installed, works like a charm. I was disappointed in that it cost me over $500 to have 2 of them installed. The website says its easy to install and I'm no stranger to electrical work, but for my situation (my house is 14 years old), I could not install it myself and it took 3 installers 4 hours to make them both work. That said, they do work great. I have been across the country and was able to adjust the temp settings in the house via my iphone. The programming was easy and quick and I think we are saving money on oil.

This is my second unit, easy install and is very accurate.The only thing I would like to see improved is a backlight.

easy to install but had electrician do it since I don't like working with electric wires. still having difficulty programming. got it to follow a schedule everyday of week but when indoor heat reached 2 degrees above the heat setting and 4 degrees above the cool setting, the cool setting did not kick in and had to adjust manually, which is very easy to do but that defeats the purpose of a programmable thermostat. i watched numerous online videos and still can't figure out how to get it to cool when indoor heat reaches above heat setting.

Check Lowe's for a similar model that is A LOT cheaper. Wish I'd seen these before buying this one. But there is nothing wrong with it. Note that it does not have a "CIRCulate" mode like similar ones from Honeywell.

Good unit. I'd recommend going with the WIFI version as it seems like homes are becoming "Smart" these days. The touch display is a little tricky but i installed this in my 70+ yr old mothers house to replace her 30+ yr old metallic spring thermostat and she does just fine with it. The only thing to be aware of is when the battery starts to fade or dies, the unit is dead which results in the house going cold so monitor the battery which lasted over a year.

It took more that 15 minutes to set this product up with a backup heat pump system. Not quite as simple as you might like but it can't be helped when you have A/C, heat pimp and auxiliary heat to contend with. Also, a big facto when deciding to purchase is that the product dimensions shown are not correct! This device is not 10"X9"X2" as described but actually 6"X4.5"X1 1/4". That is a huge difference and should be corrected. I have since discovered that it is important to RHEEM A/C, heat pump owners to set 0190 heat pump changeover valve to 1 not 0! RHEEM is the only manufacturer that requires this setting.

I like it. I found it to be very user friendly, easy to connect, and easy to set up.For me, its only minor downfall is how it handles the AUX heat, as others have mentioned. I have a basic setup, heat pump + electric AUX heat. As I watched it, the AUX heat was kicking in way before I thought it was necessary. I eventually reprogrammed the thermostat to disable the Adaptive Intelligent Recovery, and disable the AUX heat altogether. The past few weeks have had some -15 ºF nights, and I woke up to a temperature 4 ºF lower than what I set it to, which for me is fine. It is not worth the cost of running the AUX heat (excessively as this thermostat does, IMO) all winter for the few nights where it gets that cold.I would prefer the "Heat" setting to be Heat-pump only, and the "AUX Heat" setting to allow the AUX to be used, or some other way to prevent the AUX heat from coming on 98% of the time, and to enable it for the couple nights a year where I would actually use it. (other than going through and reprogramming it each night/morning.)

This model works well and the app is fairly easy to use. I would have rated this a 4 or even five except for two things:1. The Honeywell documentation is weak, particularly from a troubleshooting perspective, and the phone support is even worse.2. This model has a software bug that does not allow the wake time to be set at 2:00 AM or earlier. The wake set-point will be ignored if set earlier than 2:15 AM. Email support claims this is a "calibration", but this "feature" isn't documented and I have used several other brands of programmable thermostats that don't have this handicap.

Pros:- Easy Installation- Easy Configuration/scheduling.Cons:- Loud clicking sound each time the thermostat starts/stops the AC (Very annoying).- Cannot control using local WIFI (LAN). You must control via internet using mytotalconnectcomfort.com website.

Product is okay, but could be better. Their controller app for Android is very, very basic and needs a LOT of work, but it functions for VERY basic stuff, if you don't mind it crashing and having to restart a lot..I do wish, though, I had waited 2 weeks, as the price dropped $10.00.Yes, I would very likely still buy it, as I live in the Desert southwest and need to reduce my power usage to as close to zero between 3:00 pm and 6:00 pm. But any programmable t-stat will do that.If their wifi app interface was better, it would be worth 4+ stars,,

As other reviewers have noted the set-up of the WiFi is no simple task. I do not knopw what the problem was the first two time I tried but finally had success on the third try. The biggest frustration was getting it into "Wifi set up" mode. The in structions said that if "when" the set-up fails you need to pull the unit off the wall for 10 seconds and it should start over. In my experience this did not work even when it was unplugged for over 5 minutes. There should be way to force the unit into wifi set-up without pulling it off the wall. On the programming front it was very tedious until I noticed the option to set multiple days to the same schedule. Too bad this was not explained from the start so that I could have avoided the frustration of setting up Monday, Tuesday and Wednesday on the same schedule.

This product worked as advertised eventually. Tech support from Honeywell is essentially non-existent. The thermostat apparently is not compatible with my Zyxel router from Centurylink. Called tech support and they could only read me the manual before hanging up on me and not calling back even though they asked for a call back number. When I called back, the new tech had never heard of a firewall. You will need to have someone who is internet tech savvy to make sure the WIFI hookup will work. In some cases, router ports may need to be opened. I had to disconnect and essentially reformat the thermostat about 8 times before it worked. Most was due to the router incompatibility.

UPDATE: After two years, it started behaving erratically (maybe got fried in the same storm that took out my computer?). In any case, for a replacement I opted for the Sensi UP500. After using the Sensi, I've lowered my rating of this product from 4 to 3 stars. See my review for that product.Basically, it does what it's supposed to. It's relatively painless to install (assuming you have the correct wiring setup and wireless network). And when combined with the app and online access, it's very easy to use.The mobile app is pretty good, but (annoyingly) requires you to login with an 8-digit password every single time you launch. And it's missing some really no-brainer features, like a "change filter" reminder, or the ability to automatically switch from heat to cool, based on a temp range. Or location awareness (my phone knows when I'm home, so why doesn't the app pass on that info to the thermostat, and adjust the temp accordingly?)The website is a little clumsy (it's not at all clear how to get from the landing page to the schedule). And I was really disappointed to see there's no data tracking (How long was my system running over X period? etc, etc).But for a fraction of the cost of competitors, it's hard to complain.USER TIP:I noticed shortly after I set the schedule, that the AC was turning itself on BEFORE the time I had it scheduled to go to a lower temp at bedtime (up to an hour early). I couldn't figure out why, so I contacted support. This is the email I received:[Adaptive Intelligent Recovery, also known as Smart Response, is a feature that allows the thermostat to turn on the system earlier than programmed, so the house is at the programmed temperature by the onset of the comfort period. // The Adaptive Intelligent Recovery feature calculates the recovery ramp based on the number of degrees away from the desired set point and previous equipment performance. The recovery ramp determines the optimum time to turn the heating or cooling system on. If the set point is reached too early or too late, the ramp is adjusted for the next day's recovery, until the set point is achieved at the desired time. // It is necessary to allow the thermostat at least 10 days to "learn" a new program. If the set point is adjusted or the thermostat is switched to off during the recovery period, the thermostat interprets this as a new program input, and the learning period restarts at day one. Please be patient while your thermostat is in this learning phase. // If you would like to disable this feature, press and hold the Fan button and the up arrow key for five seconds. The screen will then change, and you will see two numbers appearing. Press the Next button until the number on the left becomes 13. Use the arrow keys to change the number on the right to 0, then press done.]

Was told it had a fan circulate button or adjustment, but it did not come with it like I saw the same in my son's home which had one. Bought the same model as his, RTH8500D, but not the same

This nicely-priced thermostat looks exactly like the one I needed to replace. Very convenient to have the same wall plate with the exact same wiring configuration. However once it was installed and set up, I was getting heat when set to cool, and nothing when set to heat. I called Honeywell (very helpful) 800 number. We went over the details. Turns out this is not compatible with certain heat pumps. To be specific, I looked at the settings for the old thermostat (installer/setup mode) and it called for two cooling cycles but only one heat cycle. There was a set-up for this configuration, but Honeywell informed me that despite those instructions (wrong) in their manual, it would not work, and I needed the (far more expensive) RT9580WF to handle that configuration. So: I can't tell you how well this works; I would just say that if you have a heat pump, check with Honeywell support before you purchase.

I'm giving this 3 stars because I had to buy a replacement for the house I moved into about a year ago. The functionality of this thing is great, its a breeze to program. However I would have expected such a simple piece of electronics to last almost forever, especially at the $100 price point and its mounted to the wall, so it's not being subjected to harsh conditions...The one I had just up and quit working, I think the internal relays broke.

Does the job but...I purchased this thermostat because I just replaced my HAVC system. Although there was nothing wrong with my oldthermostat, I figured I'd replace everything for today's energy efficiency standards.Works as intended but the way the engineers/designers have it setup keeps your furnace frequently turning on.Example: If you set the temp for 70, it will get the temp to exactly 70. Once the temp drops down to 69 it turns onthe system again. No buffer temp settings which is an issue if you have a house in the northeast during brutal winters.My older thermostat would heat up 2 degrees warmer than the set temp then allowed to drop 2 degrees cooler to preventthe system from running frequently. That way it's more merciful on your system and energy bill.The other issue is the display. The touchscreen is sometimes non-responsive. The backlight would be better if it were a lighter color and brighter. The characters are small and difficult to read if you have less than optimal eyesight. Although it's programable I believe they miss the mark om some key programability. such as temp buffer settings, font/character size, backlight adjustment and so on.Other than the issues I've mentioned, it does the job. Although I think I'm going to reinstall my older thermostat which was kinder to my system and utility bill. The old saying goes: If it ain't broken, why fix it? Lesson learned. If you're in a drafty house and have brutal winters I'd suggest sealing up those drafty areas. But most importantly, seek a thermostat with a reasonable buffer setting to prevent wear and tear on your HAVC system and your utility cost.

Reverts back to the manufacture's settings. Have had three HVAC techniicians try programming personal settings, but it will not Hold. You can set it to Hold for a number of hours or days only. I have had many thermostats, this one is okay, but not one of the best I have had by any means.

I installed this unit to replace a RiteTemp thermostat with a dead display. This unit offers a lot of capability, but lacks the control for a humidifier that my RiteTemp included. I've learned that I can buy a different Honeywell version for substantially more that will add that feature, but decided it just wasn't work the expense.This unit works great with my multi-stage heating and cooling. The temperature appears accurate and the run times are appropriate. Since my home is occupied 24/7, the programmability of the thermostat is of little use to me. I had to buy a unit of this scale in order to get the multi-stage controls. I do like the backlit LCD display on thermostats, but I find this one to be a bit difficult to read because of it's height (compared to mine) and the green output from the backlight. It could be brighter, and using a white background color would make it MUCH easier to read and navigate. Other than that, I find that this works very well so far.

Very difficult to connect with Windows--actually I never did get it connected. The description does not say that you need a "C" wire--only when you open the installation manual does it mention that. The manual also doesn't say what a "C" wire is, or where to get one (you need a separate transformer), which means another wire in the wall. The customer service video was no help, nor was the call-in customer service. I ended up returning it and getting a more expensive, but more user-friendly brand.

Well it looked good, felt good but you know what? I wouldn't recommend it in an older home.Why?THAT DARN C WIRE!!!Yes, they have instructions on how to bypass the C wire and make it work, but you give up manual control of the fan, and you have to make concessions that you don't have to make with some other brands. There's a difference between a thermostat that works well, versus a thermostat that you have to make work. Being that I would have to "make it work" versus simply wiring it in and being done, I chose to return this product and buy another.

This is a tough item to rate. I loved the ease of installation. It was up and running within minutes. It connected to Alexa without issue. The interface is excellent. The Honeywell app is very usable. However, I had to return it. The temperature differential, otherwise known as the cycle rate, is +/- 0.5 degree. This thermostat was turning my compressor on and off within 5 minutes only to do so again within a minute or 2 when the temp went back up a half a degree. It probably cycled at least 10 or 12 times in an hour. That kind of constant on/off pulls a lot of power unnecessarily and causes additional wear and tear on the hvac system. Honeywell service center days that there is no way to change the differential and it is set that way to maintain as accurate a temp as possible. I returned this unit and purchased an Emerson SensiSmart. That unit allows the owner to set the cycle rate to slow, medium, or fast. I rated this one at 2 stars because in my opinion it is unusable, but I can see how other people might prefer this level of accuracy and, as I said at the beginning, I love everything else about it.

Minimally, the thermostat works. Several gripes will keep me from buy any more, however:1. I'm not sure the quality is there - In 3 years I've had 1 DOA, 1 quit working completely, and 1 quit working reliably.2. The Honeywell iOS app doesn't always work reliably.3. It's kind of dumb that a smart thermostat can't set its own time from the Internet.

Great thermostat, horrible service behind it. This is about the application service to remotely control the unit. When it works, it works great, but it has a frequent down time, and the folks at Honeywell don't seem to fix things that happen on their servers after hours. Just last night/this morning, it was down for about 12 hours. The application would throw an error that it can't connect to the servers. Tried on multiple devices, networks, all the same. The thermostat is on the network (i can ping it). Then suddenly after 8am this morning, it starts working again normally. I will also get notifications that the thermostat is offline, but I can see it on my network. I wish there was a way to override the remote access and go local network access only. Fortunately, the thermostat just continues as it should connected or not and you can control it locally.

The thermostat is fine as a wall thermostat, but the Wi-Fi remote connection is very unreliable. If the home Wi-fi drops even for a moment the thermostat needs to be reprogrammed and the remote connection will not work until it is set back up. The occasional convenience is not worth the aggravation of physically reprogramming the thermostat every week. Do yourself a favor and find something more reliable.

Wish I knew that screen lock option was not available in this model before purchasing

Before it was two years old, the screen backlight stopped working. Now I have to use a flashlight to adjust the settings.

I have several of the commercial version of this unit, and ordered these thinking they were the same, but they are not. The key feature that is missing is the ability to lockout the touchscreen.The other version of this is awesome. I have half a dozen that have been in operation for over 5 years with no problem. I put them in frequent-use areas, because the adjusted lockout allows me to make it so that no one can adjust it, or set it so that the temp can be adjusted for a short period but it goes back to normal afterwards.This unit does not contain the lockout feature, meaning anyone can change the temps, change the programs, or do whatever they like to it. It is not much better than a cheap basic model from your local hardware store. Spend the money and get something better.

Do not use with a heat pump. This thermostat kicks the system into alternate heat quickly rather than ramping up the temperature using the heat pump so we have just left it on a set temperature rather than adjusting the indoor setting down to conserve electricity. Honeywell says there is a 3 degree difference in the set temperature and actual indoor temperature before calling for alternative heat. This isn't our experience. Wish I had done more research prior to purchasing.

Well it lasted 11 months. When using A/C I always keep it at 77 degrees when the A /C comes on as it should and the temp drops to 77 it doesn't shut off it keeps running but yet some how it still shows that it is 77 degrees in the house. My guess is that the display that shows you the inside temp is different than what it is actually reading like it has a separate thermometer that reads different?I bought this in Nov 2013 and according to Amazon my return/refund ended in Jan 2014....seriously only 3 months?

When this product works, it is great. Easy to install and use; great functionality. Those aspects would have earned this product 5 stars. BUT, I purchased 5 of these for the different zones in my house. 4 have worked flawlessly. I had to replace 1 of them TWICE, because of erratic behavior of the touch-pad and thermostat. For example, each of the defective ones would work well for a week or two, then the touchscreen would become non-responsive and would set itself to NINETY DEGREES and couldn't be changed. Ugh! Probably worth finding another brand (not many out there). Or buying Honeywell's professional grade. (Also: dealing with customer service was a neutral experience. Agents were bland but not offensive. They seemed to understand the issue. BUT, once they resolved to to send me a replacement, it took 3-4 weeks for it to arrive!! In the middle of a single-digit-temperature stretch in New England.)

I am very disappointed with this product. I wanted a thermostat that could be controlled from my iPad. After downloading the app from Honeywell I am unable to control when my heat goes down at night and up in the morning.I would return this product except It is already installed and I would be out the installation costs.DO NOT BY THIS PRODUCT!

Could not get thermostat to work with standard HVAC a/c-gas heat system. Used a transformer to power "c" wire and unit powered up, but would operate properly. Had to return to Amazon.

when i installed the thermostat it tried to set itself on fire. but the single star (should be no star) is for the dealer, not the thermostat.In late march of 2017 i bought the "good as new used" honeywell wifi, programmable thermostat (RTH6500WF), from EverythingDeals, The package it arrived in looked fine and the unit looked new.. I didn't remove the thermostat from its package because it needed the "C" wire attached and my furnace system didn't have one. I decided to wait running the C wire until this fall because there was little need for the thermostat as it was intended to replace a working older one.this month i got around to running a pair of wires to the thermostat location. (C and Rc). as per the instructions I attached the two furnace wires to R and W and the two new wires from a 24 volt transformer to C and Rc after removing the jumper between R and Rc. triple checked to be sure the four wires were in their proper placement in the wall plate. checked to be sure the voltages were correct.When i plugged in the thermostat to its wall plate the display did not light. in a moment i smelled hot electronics and immediately pulled the thermostat off the wall. part of the plastic housing was very hot and had started to bubble. And there was something rattling around inside that had not been rattling before. not sure what happened, but clearly this was not a good as new thermostat.in talking with honeywell's overseas support about getting it repaired i was very nicely told i had to deal with the seller (EverythingDeals) to get it repaired, replaced or returned. But of course EverythingDeals has a "we don't care what happens after thirty days" policy.the galling thing is i had previously installed a honeywell T5 wifi thermostat and had no trouble doing it, including running a pair of 24 volt C and Rc wires to it. the install was no more difficult for the rth6500wf than it had been for the t5. the wiring was the same. the places for the wires on both units were well labeled and labeled with the same letters.so - bought a second t5 from amazon. used the same wires in the identically labeled sockets (removing the jumper) installed it with no problems (no burning) and it works as advertised.perhaps i am wrong but it seems sensible to think the unit was never tested to see if it actually was good as new. buyer beware.

Product would not work. Wired according to instructions. Has the same configuration as my current unit. Defective.. Seems I'm a day late in returning it... Not a Happy Camper....

Just installed it, but am one day beyond the return date and it does not work. Won't turn the air conditioning on, and it is wired correctly.

They die and when they die, they can cause big problems. I had one randomly change the set up program and instead of cooling, ran the heat pump up to 95 degrees before I returned to the house and found it--the heating contractor figured out what happened (that happened 4/22/17). Another house on 4/27/17 (fifty miles away from the other failure) suddenly went to heat while the thermostat was set to cool. Even turning the thermostat to OFF didn't cure the problem so I had to turn the furnace off. I've owned five of these over the past four years and used them in three separate locations; four have failed.

Bought 2 of these. Both of them malfunctioned for cooling. Heating works, but cooling was not working sometimes. I changed to emerson sensi thermostat and it works without issues

This does not work....don't buy it,,,unreliable and poorly constructed....has been serviced multiple times, keeps failing...throwing this out.

i have it for 2 months, worked well until now it holds my temp at 90 no matter what i do. I called Honeywell and they told me there is nothing they an do and to return to the store since it has a 1 year warranty but I can not return since amazon return is already past the time allowed.

I bought this item in December and not even 6 months later it has stopped working.

The thermostat was purchased for its large format screen. The product was advertised to work with the conditions at the installation. After 6 phone calls to Honeywell for help to wire the unit, it was not operational. I contacted the contractor who installed the heating system 10 years prior and was untimately told that Honeywell did not make a large screen thermostat that would work for the installation. I subsequently installed a LUX TX9600TS and it worked fine. If you want a Honewell thermostat, check the wiring first and call Honeywell to see if it will work before you purchase it.

I bought the RTH8500D in late 2011, and was happy with the unit for about a year while all of the great features worked as advertised. Sadly, I can no longer say that.In December 2012, I noticed the heater would not come on in the morning. The unit said "following schedule", "heat", but would show a current temperature of 63 degrees, and a "set to" temp of 70 degrees, meaning the heater should come on, but it wouldn't. I changed the batteries, reprogrammed it several times, but the heater would NOT turn on. The heater worked later in the day, as advertised, but NOT in the morning. Since there are 4 time periods (wake, leave, return, sleep), I stopped using the wake period. This seemed to help for a short period of time, but now, in early Feb 2013, the heater is again not coming on in the morning...even though the unit says "following schedule", "heat", inside temp well below the programmed "set to" temp.I will look for a replacement, but likely not a Honeywell.