Sensi Lite Smart Thermostat, Programmable, WiFi, Easy DIY, Works With Alexa, ENERGY STAR Certified, ST25, Most Systems C-Wire Not Required, C-Wire needed with Heat/Cool Only & Heat Pump System – Black

I am impressed. First of all, watch the installation video in the item listing in Amazon. It is the first video for this Sensi Lite Smart Thermostat and it could not be anymore thorough than it is. If you want step by step it is that and logical. Then the app itself does the same thing, step by step as well. These folks actually cover all the bases. I know a lot about a lot of this but not AC and heating. It went off without a hitch, I have an old 4 wire system with no C wire and what is really cool is BEFORE YOU EVEN BUY you can d/l the app, go to the step as if you are installing a new one, go where you identify the wires on your old thermostat and it will tell you if it will work for you if you are not sure. I had this thing on, up, and connected to wifi and running in about 10-15 minutes, no issues. The only thing that concerned me was I was reading reviews before buying it and some people complained about it losing connectivity frequently. Only 3 minutes after installing that happened one time, and as I was reading the re-connect instructions it prompts you to, then it reconnected on its own before I could do it. For all I know that could have been my wifi burping, it does sometimes. >>IF<< I have that as a recurring issue I will be returning it because my router has plenty of reach and several devices further from it than this thermostat never lose connection. We shall see. I am just trying to give a full picture, I have no complaints but that was the primary reasonable one I saw in the negative reviews. So far I love the thing, the display is very cool, most of the time I will be bumping it manually walking by and that is a piece of cake. I have old eyes and appreciate the large numbers on the display too. I also like I can adjust it remotely from 4 states over as well. Honestly if you just want a remote app and basic functions with a schedule (I won't use) I don't know about all these others that cost way more why you would buy one of those. It is also nice looking. Oh yeah, it works on Alexa and other voice control things I also do not use. I think you get a lot of bang for the buck on this.

The Sensi thermostat is easy to install and works great. I have a steam boiler, so I was able to set the heat cycle rate to slow to allow the boiler to run longer and not cycle off and on so much. I use the schedule to lower the heat setpoint while I’m at work and at night. It’s also nice to use the app to raise the setpoint before I get home. I even got a $50 rebate from my power company after installation! Definitely recommend!

I decided to return this Sensi Lite Smart Thermostat simply because I realized that my old thermostat was still working perfectly fine. After receiving the product and reviewing my current setup more carefully, I determined that upgrading wasn’t necessary at this time. The return had nothing to do with the quality or condition of the thermostat itself. The product arrived in brand-new condition, well packaged, and exactly as described in the listing. I did not install or use it, so I cannot speak to real-world performance, but from what I could see, the build quality looked solid and the design was clean and modern. The instructions appeared clear, and the features listed—such as Wi-Fi connectivity, app control, Alexa compatibility, and Energy Star certification—seem useful for someone who actually needs an upgrade. My decision to return it was based purely on practicality. Since my existing thermostat is functioning well and meeting my needs, I couldn’t justify replacing it right now. I prefer not to change things unless there’s a clear benefit, and in my case, there wasn’t. That said, I believe this thermostat would be a good option for someone whose current unit is outdated or malfunctioning, or for anyone looking to add smart features to their home. The focus on data privacy and easy DIY installation is definitely appealing. Dispaly size is good you can easly control temperature and easy to use. I’m giving this product three stars—not because there’s anything wrong with it, but because I didn’t end up using it. If you’re in the market for a smart thermostat and need the features it offers, this could be a good choice. Just make sure you actually need an upgrade before purchasing, as I learned the hard way.

I managed to get this working with my old brivis gas heating unit. This thermostat need C wire for gas heating. Old thermostat had only two wires. But the heater unit had C wire built-in which I rewired to connect to this thermostat to make it work. Setup is very straightforward. It's being one month since I installed and working perfectly. Happy with thr product so far. Note that this is a US product and it has US units and location/ weather information is only related to US or Canada. But I use Alexa and Google Home to align with my location in AU.

Great thermostat but make sure you have the right hook ups and wiring on your old furnace before removing your old thermostat or you will be in for a headache, basically do your research before tearing things apart and watch plenty of videos. Thermostat works great once it was hooked up and being able to control from your phone is a blessing.

Works great. Love the Wi-Fi connectivity and being able to adjust remotely. Great for referring the temperature when coming home from a trip

This shouldn't be sold globally. You can't use it as a smart device outside Canada and the US.

I had tried 2 different units of the same model and they both exhibited the same issues. The problem was a loss of wi fi signal and the system was going into off mode. Tried calling the help desk but was but on hold hearing the same message for 20 minutes. There was no message stating that there was a back log of customers. Appearance and simplicity I give it 5 stars but automated functionality I have to fail it.