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Sensi Wi-Fi Programmable Thermostat, 1F86U-42WF for Smart Home - Emerson
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Honeywell RTH9580WF Wi-Fi Smart Thermostat, Control from anywhere, free via iPhone, iPad, Android and computer (HoneywellRTH9580WF ) - Honeywell

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Sensi Wi-Fi Programmable Thermostat, 1F86U-42WF for Smart Home - Emerson
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Honeywell http://ecx.images-amazon.com/images/I/51TkjhX3npL._SL160_.jpg
Honeywell RTH9580WF Wi-Fi Smart Thermostat, Control from anywhere, free via iPhone, iPad, Android and computer (HoneywellRTH9580WF ) - Honeywell
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eComparisons Score
eComparisons ScoreThe "Comparison Score" Is calculated based on the average number of times this item was compared with other items in this category by our users
8.2
8.4
User Rating (Amazon)
User Rating (Amazon)

Five Star Reviews:

66%
Works Great On My Water Furnace Series 5 with IntelliZone 1 Panel
June 14, 2017
A FANTASTIC product with EXCEPTIONAL customer support!! I was looking for an upgrade to my 17 year old WATER FURNACE thermostat (TSTATWFN2S01-A) as we recently replaced our old Premier 2 Water Furnace with a Series 5 Water Furnace. When first attempting to install the Sensi Thermostat it immediately displayed "Call for Service". After a couple of calls to Sensi Support and a wonderfully helpful email from Sensi Support I was able to complete my installation. I hope this review might be useful for any other Water Furnace owners as configuring a GeoThermal system was a bit daunting for me! If you do have a 20-30VAC "C" wire in your system you may likely need to make an alteration to the thermostat jumpers, but I would recommend contacting Sensi Support before doing so. They did a fantastic job walking me through what was necessary!
Great Smart Thermostat!
May 31, 2017
This thermostat has performed flawlessly for the last year. It works with Alexa directly and/or via the Wink Hub (which allows you to control it via Google Home). The temp is accurate and the scheduling feature is great to have. The only slight gripe is that since the app was updated it turns off the schedule if you manually change the temp, but this is probably a setting somewhere - I haven't checked yet. Before the update you could manually change the temp but it would revert to the schedule once you hit the next time block.I was deciding between a Nest and Ecobee when I stumbled across this. Yes it's cheaper, but I primarily chose the Sensi because both of the other models had reviews stating that the temp readings were not accurate, possibly due to the heat generated by the thermostat's own touch screens. I'm glad I went with this one, saved money and it does the job of being a thermostat really well, albeit without any flash.Installation was a breeze too, once I realized that I was following the wrong diagram on the backplate. If your system only runs heat then you may have missed the other wiring diagram that's on the bottom of the connectors. Once I saw that and swapped some wires around everything worked, and the app makes it nearly impossible to screw up.
Happy owner
February 18, 2017
I really wanted a Nest. Yes, I said it. But the only thing that the Nest does that this unit does not, is it figures out what temperature it thinks you want. Well, for less than half of what the Nest costs, the Sensi does an excellent job of keeping your house at whatever temperature you set it for. It connects to wifi so you can control the temperature through their app...from anywhere. It can be turned up or down anytime through your smartphone or by touching the unit, or just use an Echo (Alexa) to tell it to change the temperature. You can also set up an "away" schedule for when you are on vacation.The instructions that came with the unit were easy to follow (and they also have a video detailing the installation). We are very pleased with this upgrade.
Works with duel fuel and Echo / online
July 16, 2016
I love it! I have duel fuel heat, i.e., we have a heat pump for heating and cooling plus we have a gas furnace as auxiliary or emergency heat when it's super cold. Heat pumps start becoming inefficient below 45 degrees. This thermostat will control them all.The installation was very easy. I ended up having to call support to get an answer on one wire that was coded differently from their "pick list" in the installation app. When I called, I got right through to a human being. He had an immediate answer for me and I was on my way.Now I can control the temperature in the house from the app on my Iphone or from anyplace where there's a wifi connection.I also have the Amazon Echo / Alexa and it's connected through it. Now I can say, "Alexa, lower the downstairs temperature by 2 degrees."Update: I just bought a second one for the upstairs where the kids' bedrooms are. There is a lockout function for the keypad so that the temperature can only be controlled via the app or online. This will pay for itself very quickly!
Great WiFi Thermostat
December 3, 2015
--UPDATE: 3/22/2017:I just noticed that Keypad Lockout is now an option on the app, so if you have kids or roommates that you need to prevent from messing with the air, you will be happy about this option! (Original review below).--UPDATE: 3/4/2016:Now works with Amazon Echo! So you can control your thermostat with your voice by speaking to your Echo device! Very glad to see this addition. However, still lacking more features for the app (see original review below).--I had been wanting to get a WiFi Thermostat for a long time now, but I held off because I was worried that I would buy one that wouldn't be compatible with my home or that I wouldn't be able to figure out how to install it. I finally gave in and purchased this Sensi thermostat, and I am extremely happy with the purchase.Set up could not have been easier. The app walks you through the installation. You select the wires that your current thermostat has, and then the app tells you what to label them and where they will go in the new thermostat. I had never replaced a thermostat before, and it took me under 30 minutes (which includes unboxing, looking for screwdriver, looking for AC unit shut off switch, watching how-to videos included with the app, etc).The actual operation is simple and efficient. Within minutes, I was able to set up a generic schedule based on when we are usually home. I love being able to change the home's temperature from my bed, office, or anywhere in the world with an Internet connect. The first few days I played with it a lot, but now that I have tweaked the preset schedule, I don't even have to worry about it anymore. If I am out or home at unusual times, you just adjust the temperature manually, and it will temporarily suspend the preset schedule.The thermostat looks nice, aesthetically, on the wall, and since I apparently had this magical "common wire" I have the option to keep the LED light on at all times, which acts as a night light in the dark, and makes it look even better.The app is handy because it also tells you your local Hi and Low temps from the forecast as well as the humidity in your home, upcoming schedule, set temp, actual temp, and the background is either blue, red, or grey depending on if your system is on Cool, Heat, or off at the moment. There are also more advanced options that I do not yet understand.The only thing this is missing is a few more advanced options for the app, such as specific alerts (like if the temperature is changed manually, I would like to be able to get an instant alert on my phone) and an air filter change reminder that can be set for a certain amount of time (like 1, 2, or 3 months). I think it does alert you if your house reaches an extreme temperature, but I have not had that happen yet. Also, I have not been able to figure out how to switch between "Cool" and "Heat" modes within a schedule (without using the "Auto" setting).I also purchased and installed the wall plate: Emerson F61-2663 Wallplate for Sensi Wi-Fi Thermostat, White, White (was approximately an extra $10). I think it should have been included, but I imagine not everyone wants one. It isn't much bigger than the thermostat, but I think it makes it look nice. I included some photos so you can see for yourself.Feel free to ask me any questions in the comments and I will do my best to answer them.
It's everything I liked about the Nest, and.
July 14, 2014
My review is mosty "versus the Nest" because I've had three different Nests and know that one well, and I like this one better.When my Nest died last month, I decided I was going to buy a thermostat from a company with a history of making thermostats work reliably.I would have installed this myself, but my A/C guy who installed my system and troubleshot my Nest two years ago ... and then came back and troubleshot the replacement Nest last month said he would remove his loaner 'stat and install whatever I decided to buy.The one feature of the Nest I knew was hooked on was the ability to change the temp from my phone. Sensi and several others do that now, so I had a few to choose from. In my research I learned that my primary complaint the Nest - that the temperature swing was too wide - was addressed by Sensi's "cycle rate" setting.I like that the Sensi wall unit operates like a traditional thermostat. Nest's no-button design is cool, but using a thermostat is not a lecture in UX minimalism, and black-and-chrome doesn't really disappear into the background of my home (white trim and all).The Sensi is actually an easier DIY install than Nest (screw-down terminals vs. push in notwithstanding), and the main thing I would tell other folks is: install the app on your phone first and let it walk you through the installation.This, Sensi, is what I want in a thermostat. Convenient, reliable, programmable, understandable. I am okay with a modest premium for being Internet enabled. It's half the price of Nest and doesn't intimidate non-technical users. You can keep your auto-programming feature - I always fought with the schedule it created and with two young children we're home most of the time anyway. You can keep your monthly energy usage report - it didn't include enough detail to be useful anyway. And you can keep the space-odyssey design - it might be alright in the stainless-and-black kitchen, or media room, but it doesn't work upstairs.Granted, we didn't also install a second Nest to have more temperature sensors, and we didn't buy their $200 talking smoke detectors which also report environmental statistics back to the thermostat. But I've got what I need from my thermostat now.P.S. It took the last Nest two years to go kaput, but I'll update here if that happens to my Sensi.Update: After about a month I'm still very happy with Sensi. Most people won't care about this but being a network security engineer, I'm impressed that the thermostat has exactly 0 open TCP ports, outbound communication is with one IP, and total traffic is very modest. Nest communicated with a whole bunch of different IPs and was much more "noisy" on the network. Good work, Sensi dev team.
65%

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Four Star Reviews:

12%
Got it to work with my millivolt system
December 14, 2016
Sensi Smart Thermostat, Wi-Fi, UP500W, Works with Amazon AlexaThis was perfect for my fairly unique needs. I have a shop in part of my barn that is heated with a propane wall furnace. It's heat only and it's a millivolt system. There is no common wire used so at face value, this thermostat would have problems. In fact, on the initial installation it seemed to set up just fine and then overnight it stopped working. A quick visit to the manufacturers website helped me conclude that even though the thermostat "technically" didn't need power from a common wire, most problems (wifi shutting off, thermostat not shutting furnace off, etc.) on a setup like mine were attributable to not having or using a common wire connection.The solution was simple. I ordered a 24 volt transformer from here...this one...https://www.amazon.com/gp/product/B00872WOR0/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1...and plugged it into a nearby outlet. I followed the wiring directions from the manufacturers website for a millivolt system....here...[...]...and all was well. I re-configured the wifi and it's been great ever since. If you need a millivolt thermostat for your system, what I did will work just fine.The thermostat itself has all the features I need. The app works fine. Integration with Alexa (Amazon Echo) exists but the commands are quite limited. For example, I cannot ask Alexa to turn the heat on or off....I have to do that from the app or directly on the thermostat. I also cannot ask Alexa what the current temperature is or what the thermostat is set for. Again, only on the app or the thermostat itself. I can ask Alexa to set the device if it's already on or raise / lower heat. I wish the integration was better but what does exist works fine.I'm considering buying two more for the house (2 boilers) and now that I got this one working I'm confident I'll be happy with more.
Sensi Thermostat for Heat only radiator system and no C wire.
October 28, 2016
I was misled by the Amazon advertisement statement "No C wire required". It now reads "(no "C-wire" required for most HVAC applications)". I have a heat only radiator system with only two wires (Red and white) and 24 VAC was absolutely required from a C wire or elsewhere. I bought a 24 VAC transformer and some thermostat wire from Amazon ($23.87) and used that for the 24 VAC (I was able to plug in the adaptor in an outlet and run the wires through a closet so they are not visible). My heating company wanted $95 an hour to hook up a C wire from the furnace.A pleasant surprise was the 'Advanced Setting' for 'Heat Cycle Rate'. With radiators and other thermostats when the room reaches the target temp the thermostat shuts off but the room continues to heat up because the radiators are still hot. With Sensi 'Heat Cycle Rate' set to 'Slow' the Sensi program keeps the room at the target temperature.I would rate this five stars if not for the confusion over C wires. Everything else was great.
From a technology integration specialist's perspective...
September 27, 2016
If you're looking for a simple, reliable, and easy experience, this is a great choice. It works with Amazon Echo (Alexa) and has a really well done app for your smart phone. Although I haven't yet paired it, my understanding is that it runs on the Wink automation hub really well. There is no Zigbee or Z-Wave transmuting to/from this thermostat. This is a WiFi connected thermostat and its integration with Alexa and Wink is a WiFi connection.Installation was a breeze. I should also mention that I consider myself a fairly well-rounded Do-It-Yourselfer. But even if I weren't, I still feel anyone who can turn a screw driver should be able to get this done. You first download the Sensi App (Android or IOS) and it walks you through it really well with step by step instructions with photos.I was a little surprised to see that, at the time of writing this, this device does NOT work with the Samsung SmartThings hub. I would imagine this would be among the manufacturer's top priority due to the obvious popularity of the SmartThings hub.Overall, this is a fantastic option for a thermostat at a great price. If you plan on using this as part of a "smart home" component, I think you'll be more satisfied if you were using it with either the Amazon Echo or a Wink controller. If you're just a casual observer, this is a great way to add some really powerful functionality to your home.
Works good with Router on Channel 11.
June 15, 2016
I had a problem getting this connected. Their tech support was very nice, they worked with me for quite a while and then sent me a new unit. The new unit did connect better, however, it dropped offline when I plugged it back onto the wall. Here are some install tips and tricks.1). follow the instructions on the app, they work good.2). if your thermostat is in an area with a weak wifi signal do the setup near your router. The unit does not need to be plugged into the wall to go through the setup and for you to control it.3). Once you have the connection move back toward the mounting area, Stop frequently and change the temp on the app and watch the Sensi change (to check the signal). If you lose the signal the app will tell you and the Sensi will have an "X" in the top left corner where the signal bars normally are.4). If you do lose your signal check your router to see what channel you are on. If not on channel 11 then set your router to channel 11. If you have concrete walls or foundation your wifi signal can/will be disrupted and channel 11 seems to help with this problem, or maybe the Sensi just works better on channel 11?5). Sensi support will help you out but I figured out the cement problems and the channel 11 thing on my own and it got me working. I was ready to send it back.6) I have 2 routers, my old Asus RT-N66W worked better with the Sensi. It had a much lower signal than my Xfinity TG1682, but it was on channel 11 and it worked. I moved the Xfinity to channel 11 and it started working too.7). Scheduling. Note: if the Sensi is on cool and you set a schedule it will be the schedule for cool. If it's on heat the schedule will be for heat. Go into advanced scheduling in the app and turn on Multiple schedules. This will allow you to set schedules for heating and cooling.Now that it's hooked up and working I like this little guy a lot. Gave it 4 stars as I don't think the wifi receiver is quite as strong as it could be, (my phone seems better).
Better than conventional; Gives me 80-90% of what I liked about the Nest w/ no C wire.
June 12, 2016
I've had this unit for a few weeks. So far, so good. Certainly better than the conventional unit in place before, and it seems to give me 90% of what I liked about the Nest at a fraction of it's cost. Recommended.Recently switched homes. I had installed a Nest in my previous home. I like the Nest, but always felt as if it was a bit over kill and over priced for my situation. I became, however, addicted to the ability to schedule online and with my phone. The Nest learning capacities always seemed nice but a little over hyped for the benefit it provided. I felt like I was sometimes fighting it's decisions at times.I very quickly had issues with the conventional unit in place on the new home and felt like I had no control. I debated about moving or installing the old Nest in my new home. A little investigation showed no common wire. While looking up a solution for the C wire issue, I saw a reference to this unit and thought I would give it a try. Installation and registration thru the phone Wizard was easy (used the free Nest screwdriver to install wires, but I did miss the old clamps); I had to restart the unit and my phone a few times in order for their WiFi connection to be made. But after that, it's been smooth sailing and a nice interface... and better comfort.Maybe I have yet to discover it, but I would of loved to have seen some kind of basic logging and charting; I found myself wanting tor review schedule settings. It's not a biggie, and on the other side of the coin, it means they aren't storing personal data on me online and maybe this is one reason why they can get away with battery operation.. it's less network chatty?Anyway, I am pleased. Let's see how I feel after the seasons change a few times...
Intstalled to a heat pump
January 5, 2016
Thermostat is very easy to read from a distance. I like that you can leave the backlight on all the time, if you have the hardwired power. Not that hard to install to my existing heat pump, although some of the "jumper" instructions were not very straight forward. Temps seem accurate. Programming is easy enough, but what keeps this from being a 5 star rated product is the poor app, and web based monitoring, and the problematic WI-FI/Server connection. The app will randomly say thermostat offline. You reset your modem/router then it is there again. Next time it says its offline you reset, and its still not there...turns out its the server that is very problematic. The web based monitoring is even more unreliable. This morning I watched as my programmed set points changed by itself several times with a variation of 3 degrees, BUT the thermostat never showed this change. When I went to change the temp offset, it kept fluctuating and wouldnt stay set. Also, the app needs to know waaaay to much info on my phone to install.
13%

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Three Star Reviews:

5%
Now the unit is back to dropping IP again
April 19, 2017
As a thermostat it works fine, better than the Nest and the Xfinity branded thermostat. The problem is it advertises itself as a networked thermostat. It drops it's IP several time a day making it impossible to connect to. Occasionally I have to remove the thermostat from the network and reinstall it. So I give it 2 stars, and I'm being nice.NEW REVIEW!The White-Rodgers company finally decided to do something about the dropped IP problem and fixed their software, the product works 100% now. The web site and smart phone application work beautifully now. It was however an exasperating few months trying to convince their support department that they had a problem. The conversation always started out with, "is your router working properly".NEWER REVIEW!Now the unit is back to dropping IP again, this is endemic in devices that are not designed to work with the Internet protocols. Unlike network cards and wireless devices designed by networking companies, these new companies that want to cash into the everything connected market are falling short.
Wi-Fi Thermostat
March 8, 2017
I have had this thermostat a few months now outside of it dropping Wi-Fi enough to be annoying, its a good product, Called Customer service and apparently my router is one of many that needs to be tweeked to fix the problem.. I'm not a rocket scientist when it comes to routers so better not mess with the router... would rather see a update to make the thermostat compatable with all routers!. When it does work its very nice. I would say it works about 75% of the time... the other minor issue is that it does not stay latched onto the base part of the wall very well it often needs pushed back on to secure it.
OK but lacks support for Smartthings or Google Home
January 28, 2017
I did have some issues originally with the unit loosing wi-fi connection but changing the channel my wi-fi hub uses may have helped that. Since I purchased the Sensi I have purchased a Smarthting Hub and have found that Sensi does not support Smartthing and while they say they are working on that support it comes across as disingenuous as they have been saying that for many months (years?). Having also become interested in the Google Home device I have also found the Sensi does not support that platform either. As Google Home is fairly new I can understand the lack but doubt the lack will be corrected any time soon. So.... If you just want a wifi connected thermostat with no intention of ever expanding your home automation infrastructure then the Sensi may be for you but if you want compatibility with other architectures and devices you would be better off looking elsewhere.
Sensi Smart Wireless Thermostat- An OK Product
December 18, 2016
I found the Sensi to be a good product but not a great product. On the plus side, the online app was great for wiring the thermostat and my 1999 thermostat only had 3 wires and a jumper. Because of that, I had to choose a 4 wire pattern that was close to what I had in order for me to continue on in the app. I did not have a "C" wire connected but the original builder did provide all the wires through the wall to the thermostat. I suppose if I felt so compelled I could have gone into my furnace circuit panel and determine which color wire was the C wire. However, this was not that important at the time because the Sensi thermostat wired up just fine and works well with the furnance. Okay, the reason for 3 Stars is that my Sensi wireless thermostat loses my home wifi constantly. I know for certain it is not my Comcast wifi router as I have TVs, video players, laptops, cellphones and other wireless devices accessing the wireless router just fine. I truly believe it is the Sensi that is at fault here. Perhaps, I need to hardwire the C wire to get consistent wireless performance but for now I am just going with the flow. The home builder did not make it easy for a non-electrician home owner to access the furnance electrical panel let alone find out which one is the C wire.
Easy to install and good programming. Useless wifi feature!
December 6, 2016
This thermostat was easy to install and works great once you program it. It gives you lots of programming options. However, the wifi feature is absolutely useless! I installed 2 of these and I was excited about using the wifi feature to monitor the current settings. Both units constantly lose connection to the router. 9 out of 10 times I try to check the status, the units are offline. One of the units is literally 15' away from the router and when it connects, it shows full bars. It's not a distance issue at all.I wish I saved myself the extra money and just got regular programmable thermostats.
Great looking, unreliable cloud connection
January 11, 2016
Concept is good, looks great, and works well - manually.When you try to use it from a wi-fi link, things can get somewhat tricky. After three weeks straight of it working like a charm, it just goes out. "Thermostat is offline" is what is on my screen when I load the app. I have internet connection, my wi-fi is working just fine, and even the indicator on the thermostat shows a full connection. It just doesn't connect.It didn't even let me change it via the website. Although after a few minutes, it let me log in on my phone where I dropped the temperature by two degrees. Thirty seconds later, it overrode my number, added a degree to the current temperature, and the heater kicked on.So if you want a nice looking thermostat that works well as a regular model, this is a good choice. If you want a reliable wifi connected thermostat, you might want to look elsewhere.
6%

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Two Star Reviews:

6%
Beware if you do not have an existing c-wire setup.
May 2, 2017
This product overplays the compatibility of working with a non c-wire configuration. If you know your existing thermostat configuration doesn't have a c-wire, thread carefully. Make sure to check your furnace to see if it can easily adapt to using their recommended green wire for c-wire swap. I have a split zone system - the yellow wire not connecting directly to the furnace, but through a zone box. Jumping the yellow to green doesn't work in this setup. The system seemed to work properly for heating during the winter, but when switching over to cooling, found I'm unable to get the configuration to work properly, and now past my return date.
Fancy WiFi interface with a really crappy temperature controller.
January 4, 2017
This thermostat has great potential. I love the WiFi capability and the APP. So if you are looking for WiFi bells and whistles this is a good answer. But if you are looking for a really good thermostat that has tight temperature control -- this device is a piece of junk. I have it hooked up to a high-efficiency, 2-stage natural gas furnace. The space used to have good temperature control with our Honeywell electronic, 2-stage thermostat. With the Sensi thermostat the room is simply uncomfortable on cold winter days. The PID controller in the Sensi thermostat simply lacks the sophistication and flexibility to respond to the conditions. The temperature sensor is too slow to record changes in room temperature and the room temperture overshoots the set point. The room goes from being too hot to too cold, then it all happens again. It appears that Emerson has combined a cool WiFi interface with a $5 electronic thermostat. I have communicated with the Sensi Support folks several times and they offer no solution -- no effort to update the thermostat programming or improve it. All they seem to be able to do is ask about the wiring.
Buyer Beware- Connectivity Issues
December 30, 2016
Seems like it would be a decent product, but is not compatible with a variety of routers, including my Arris from Comcast/Xfinity, (check their website for list of incompatible models). This is the most recent router they offer, so I cannot be on the only one with this issue. Will connect to router, only to lose connection a day or so later and remain offline. Worst part- the schedule can only be adjusted/set through the app, so if the Thermostat is offline, you are unable to change the program. After repeated calls to their customer service, was told to buy a signal repeater from Amazon, (another $20), and now the darn thing still won't stay connected. If I wasn’t past the return window, this would be going back…should have bought a nest.
Nice WiFi thermostat with one major flaw
December 17, 2016
I tried the Nest but wasn't impressed, so I decided to try this one. I like it for the most part but it has one annoying design fault - when you set the fan to Auto, when the thermostat calls for heat, it turns the fan on as well (you can hear both relays click). I have a high efficiency gas furnace. The thermostat should only activate the heat wire and let the furnace decide when to turn on the fan, which it will do once there is heat. What happens with the Sensi is that the system starts blowing immediately, which results in about a minute of cold air - not very comfortable. I was able to get around this by disconnecting the G wire (fan), but why should I have to do this? The basic White-Rogers thermostat I had before this worked correctly, why doesn't this one?If the support folks can tell me how to fix this I'll update this review, otherwise it stands, and I will probably return this one too...
Careful: no 'C' wire = limited WiFi connectivity
December 12, 2016
The product performs as described. The only problem is that while it said it works with thermostat wiring that does not include a 'C' wire, that's not entirely accurate. My previous thermostat did not have a 'C' wire which is apparently a power supply. I literally only had 2 wires in there. The instructions did not account for this at all. I called support. Fortunately they did pick up within a minute (on a Sunday afternoon). Then I was told by the very nice support woman that the the product would not be continuously connected to WiFi, due to the lack of power. It needs to run off the 2 AA batteries and goes into sleep mode after 2 hours system-use. The thermostat does continue to function, and we'll be periodically connected to WiFi. This is not what I expected, especially since I bought it to monitor the temperature/heating system in a part-time residence.
GREAT CONCEPT, BUT...
November 21, 2016
Great concept, easy to install and start up. Only issue is that it apparently has a very poor wifi antenna. My wifi router is just one level down from where the thermostat is located -- about 30 feet away if the walls/ceiling weren't in the way. All other devices get and maintain excellent wifi signal strength in that location (and throughout the house for that matter), but this thermostat is constantly losing its connection to wifi. To make matters worse, it doesn't reset itself and re-connect. It loses connection (about every two days) and you have to pull it off the wall, remove the batteries and press the menu button to reset it. Then it connects and runs fine for maybe a couple hours, maybe a few days, but then ultimately loses connection again. Kind of defeats the purpose of a wifi thermostat, if you can't connect to it remotely. Very disappointing -- I LOVE the concept and the fact you don't need a "C"-wire to use it. They need to improve the wifi antenna and also have the unit reset itself to reconnect when it does lose connection. Having to take it off the wall and remove batteries to reset is LAME.
6%

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One Star Reviews:

11%
Won't keep temperature correct.. varies up to 6°
May 8, 2017
Sensi Smart Thermostat, Wi-Fi, UP500W, Works with Amazon AlexaIve owned this since the 2nd week of December. In the last 2 months, about once a week it will be off by as much as 6°. The temperature will read 69°, but on the electronic thermometer I placed right next to the thermostat reads 63°, its just off... always reads that its hotter than the real temperature for some reason.I've done the manual adjustment in the settings, about 2 hours later the thermometer will return to the correct temperature & I have to re-correct the temperature a 2nd time.It also doesn't want to stay connected to my WiFi.It connected to Echo (Alexa) fairly easy, but due to the intermittent connectivity, it cant also be relied on.
STAY AWAY (AC Never Turns nN!)
May 3, 2017
worst product i have ever owned. first day it never worked so i called sensi. crappy service and couldn't understand what langauge they were speaking.after an hour of troubleshooting, i got it to work then after 1 week, same issue (AC not turning on). Called again, an hour again, got it working again... 1 month later, SAME ISSUE.rinse and repeat. Now sensi is saying it's not compatible with my system. Really? No SH*T..the tech had no idea what the issue was. reading here it seems to be a wire c issue but the reason i got this product was because it's "plug and play".do yourself a favor and buy another brand. STAY AWAY FROM THIS!!!!
Works great when the server is up
April 10, 2017
Works great when the server is up. Constant server errors. There are times during the day when the server is overwhelmed. Your Sensi will fail to connect and you also will have problems connecting to it via cell phone app or browser. This tells me the manufacture is not supplying enough servers resources to manage all the devices they have sold. Success may be destroying the quality of the user experience for this produce.I tried to save money by buying this. It was not worth it.
Dangerous for Heat Only systems!!!!
April 5, 2017
I was excited to get this thermostat, reviews were great, it was supposed to talk you through the wiring, and I was going to be able to manage from me phone. Will it did NOT work out that way!!First off, I live in the PNW, I don't have or need an air conditioning system. I have heat only. The unit is not designed for heat only. The online support did not know my wiring setup, so I had to call the phone number. I followed the helps advise and probably endangered my whole family!!Once I had the system wired per phone call direction, the system acted aweful! Every time it needed to heat up it would pull so much electricity from the house that the lights would dim, the heater would make this aweful electrical "woofing" sound that could be heard through the house!! Thankfully my dad is an electrician and was able to fix the electrical wiring. Even more thankful; my heater did not blowup the house!!!!So now no more electrical draw on the system, no more "woofing" from the heater, but it will NOT stay connected to my wifi network! The only way to get it to see the wifi is to pull the batteries from the system and then put it back together. At least this error is only an annoyance, but I am NOT happy with this thermostat. Not for heat only systems!!!
Happy after installation issue resolved, but a lot less happy after using it for several months.
December 3, 2016
Love the remote thermostat. App is simple to use and easy to access.Installation:Step by step instructions in the app were great. Easy for a first timer as well as a diy'er. The app even has you take a picture of the old thermostat wiring before you remove anything, very smart. I had it swapped out and running in 30 minutes, however there was a problem. I have a water source heat pump and the old thermostat did not have a C wire. The sensi thermostat does not require a C wire, however my compressor was short cycling, it would run for 30 seconds or so and then kick off while the fan was still running, because the set point was not reached. After 2 to 3 minutes the compressor would come on again for another 30 seconds and the kick off. I called the help line and received very good help. The technician asked me to email the picture of the old thermostat wiring and a picture of the new wiring. After several minutes the technician determined that with my unit (McQuay) was not supplying enough power to run the wifi radio on the sinsi without a C wire. While trying to come up with a solution, i decided to see if I actually had a C wire available that was not used by the old thermostat. As with most installations, the unused thermostat wires were wrapped up behind the thermostat, Including the blue wire which is most often used as the C wire. With the power off I opened the area on the heat pump where the thermostat wires were connected and the other end of the extra wires were there, including the blue wire. The thermostat wire connections on the heat pump had a C terminal that had nothing attached. I connected the blue wire to the C terminal on the heat pump and the C terminal in the sinsi thermostat, and the problem was resolved.I did not buy the optional back cover plate, but should have, and now have it ordered. If you have not have a small hole for the wires, then the thermostat will cover it, however I have a single gang (switch) box mounted vertically and the thermostat will not cover the hole. The back plate will correct that.Thermostat has now been the service for several days and have had no other issues.UPDATE:The entire reason to get the Wi-Fi enabled thermostat was to be able to check and adjust the thermostat when not present. The Sensi is off-line at least 50% of the time. When I check it with the app, it will say the thermostat is off-line. If I check again in a few minutes, it may (or may not) be back on line. It may not be back on-line for a da or more. When it is on line I feel that I have to quickly make any adjustments before it goes back off-line. The issue is not the home Wi-Fi, but with the Emerson server. This if totally useless as a Wi-Fi thermostat and I am replacing it with a Honeywell Wi-Fi. If I could return it I would. As a non Wi-Fi thermostat it works fine, but I could have saved $50 for a non Wi-Fi model, but I wanted the Wi-Fi function.
Doesnt want play nicely with my Amazon Echo
July 28, 2016
Super easy to install (i did it myself in less than 30 mins!) unfortunately Amazon Echo has issues connecting. I dont care much that it doesnt work since my thermostat is right next to the kitchen. I bought it because you can save different schedules, so if you are away on vacation you can activate the vacation mode and on your way change it to your normal settings.UPDATED: For some reason this thermostat is half of the time offline! and now is faulty. I came home twice to a house over 80 F when it is supposed to be at 65 F. Never had a problem with my 10 year old thermostat. The reason I bought it was the WIFI accessibility and if that doesn't work what's the point. Now it is not telling the furnace to shut down the heat, reinstalling my old one.
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Pricing info
Old Price
Old Price
Price
Price
$124.84updated: Dec 15, 2017
$157.00updated: Dec 5, 2017
from 56 sellers
Features
Article Number
Article Number
0786710549335
0804904126077
Binding
Binding
Tools & Home Improvement
Electronics
Brand
Brand
Emerson
Honeywell
Height
Height
147.6 in
165.4 in
Length
Length
231.5 in
370.1 in
Manufacturer
Manufacturer
White-Rodgers
Honeywell
Model
Model
1F86U-42WF
HoneywellRTH9580WF
MPN
MPN
1F86U-42WF
HoneywellRTH9580WF
Number of Parts
Number of Parts
1F86U-42WF
HoneywellRTH9580WF
Product Group
Product Group
Home Improvement
PC Accessory
Product Type
Product Type
HOME_LIGHTING_ACCESSORY
COMPUTER_COMPONENT
Publisher
Publisher
White-Rodgers
Honeywell
Reviews
Reviews
Score
Score
9
10
Studio
Studio
White-Rodgers
Honeywell
Weight
Weight
3.5 oz
4.4 oz
Width
Width
44.5 in
283.5 in
Feature
Feature

Connect Sensi thermostat to your home Wi-Fi Network and control from anywhere via free mobile app (compatible with Android and iOS). For detailed compatibility information, please refer below.

Optional 7-day scheduling helps reduce wasteful heating and cooling when no one is home

Quick and easy installation - Sensi app includes step-by-step installation tutorial

No other Wi-Fi thermostat works in more homes (no "C-wire" required for most HVAC applications)

Wink app ready - easily control and customize your Sensi thermostat from Wink app (Wink hub not required)

Contractors can add a company logo to the free Sensi mobile app and have contact information at your customers fingertips

Honeywell RTH9580WF Wi-Fi Smart Thermostat, Control from anywhere, free via iPhone, iPad, Android and computer

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