Working seriously working simlessly with my unit. It's like do what made for each other. Thanks for the marriage

I wanted to get a smart thermostat that didn't require a "C" wire. Well this fit the bill, installed it will average difficulty. After a few days, I noticed that I was always cold. I decided to test Sensi and was shocked to find it was off by 2 to 3 degrees. I had it set at 75 and it would cool to 72. No way to adjust that I could find, so back it went.

Bought this so we could remotely control temps while contractors are working on our home and we could be out of town. The BIG problem is that when the electricity goes off, this thermostat will not automatically reconnect to wifi or allow a reconnection via the app. Instead, it requires taking the front off the unit to reenter the WiFi name/password. I would call that a "dumb" thermostat! Going back to the Honeywell we had at our last house where we never had this problem

We’ve been eyeing a smart thermostat for some time now, but the cost has always seemed prohibitive, as has the thought of either an expensive professional installation or a nerve-racking DIY installation of my own. But we rolled the dice on the Sensi Lite given that so many other items in our household are smart-enabled and now part of the Alexa ecosystem of home/remote control capabilities, and I’m thrilled to say that Emerson managed to deliver an incredible amount of capability into a budget-friendly unit that is simple-to-operate while still offering sophisticated HVAC management and control, and it is an absolute BREEZE to install by your lonesome! I’ll start with the app as that is your entry point to see whether the Sensi is even going to be right for you and your HVAC system before you even open the box. Again, I must give Emerson credit for its Sensi app setup wizard—it really is just about idiot-proof. As long as you can turn off the power to your existing system and can read the labels and colors of the existing wiring to your current thermostat’s mounting block, the app’s easy-to-understand pictures simply and confidently guide you through every step. My total installation time was less than 20 minutes. Once the old thermostat is off the wall, the app gives you a “Wire Picker” screen; you simply press the dots that correspond to the color/connection of the wires you see in front of you and the app will tell you whether you have a “valid configuration” that supports easy changeover to the Sensi thermostat’s wiring scheme. Then you indicate what kind of heating system you have (electric, gas, boiler/radiant) and affix the provided sticky labels onto each wire based on how they are hooked up to your old thermostat—don’t worry, the app tells you which labels to use with which wires. Once you unhook the wires and remove the old thermostat’s mounting block, the app tells you which newly labeled wires go into which port of the Sensi’s wiring block. Connect the wires, mount the backplate, then stick the Sensi into the mounting bracket and you’re nearly done. Using your cell phone’s camera, scan the included QR code card which will establish a BT connection between your phone and the Sensi thermostat while it works to configure WiFi access to your home router. The only gotcha at all here is that the Sensi is only 2.4Ghz-capable, so those of you who have nothing but high-speed 5Ghz or even 6Ghz networks and clients will need to roll back to a wireless router that uses its 2.4Ghz radio as well. That’s it—once you’re online, you can use the Sensi app to start controlling heating or AC, setting up schedules, checking daily and monthly logs of system usage…the flexibility is really quite extensive. But what sold me on this unit was that is has an AUTO mode that lets you set a minimum temp before heat kicks in and a maximum temp for AC cooling. This was especially important to us because our spring and fall days often vary by 20 degrees or more which means we were constantly running to our thermostat to change from heat to AC once the sun started baking our house, but then we’d have to remember to switch back over to heat at night or we’d wake up freezing cold the next morning. This unit does all that for you…AWESOME! Voice assistant integration is also here—it is such a pleasure to be able to tell Alexa to change the temperature from the comfort of our bed, or even set routines for varying minimum/maximum heating or cooling temps during the day when we’re gone from the house or away on vacation if you don’t want to use the Sensi app to do so as well. And yes, Alexa can even change the operation mode between heat, AC, or AUTO as well. You want even more? Using the app, you can set a thermostat schedule for “Geofencing” and it will automatically roll back the temperature by 3 degrees when you leave (well, okay, when your phone leaves) a 3-mile radius from your home. This may not work well with multiple people on multiple schedules in the same house, but it’s cool to have the option for those of you who want to improve energy efficiency or cut heating/AC costs without having to worry about setting a specific time on a preset schedule to raise or lower the temperature. The app also offers a helpful “Early Start” option for any schedule so that heating or cooling starts slightly ahead of time so that you reach your desired temperature *by* the scheduled time rather than starting your heating or cooling at that time…nice for making sure the house is comfy by the time you normally come home from work/play rather than having to wait around for things to get cooler or toasty. The face of the thermostat itself is quite simple with just a minimal LED display that is not blindingly bright in a darkened room or hallway. There is also a touch-sensitive mode button and two arrows for up/down temperature adjustment. If you just want to rock your AC and heat old-school, you can sidle up to the panel and manually adjust it as well, skipping all those fancy features in either the Sensi app or through home automation via digital assistant. Honestly, I’m not sure what more you could really ask for! If you are already comfortable with app-style interfaces and setup, or Alexa/Google-style automation for other smart home appliances and electronics, you should have NO problems at all with any sort of intimidating or overwhelming setup or usage experience with the Sensi Lite—it is intuitive, simple, and very flexible. The fact that the app literally holds your hand with colorful, accurate and simple graphics and diagrams along the way means that even those of you who might be timid about a DIY install can do so with ease and assurance. The fact that you get so much capability, and a 3-year warranty, for a pretty bargain-basement price is just icing on the cake. Based on our experience installing and using the thermostat, unless you need an absurdly complex home control hub that also plays music, forecasts the weather, or rotates video streams or family photos, I can’t think of a single reason why you wouldn’t be happy with the Sensi Lite. VERY HIGHLY RECOMMENDED!

The Sensi Lite Smart Thermostat came in a small box with instructions as well as what I needed to install it including the batteries. Since it is a smart thermostat, it does need to be connected to the Wi-Fi so you will need that and the password, also download the application and a Philips screwdriver to put it onto place. The installation was super easy since the application is very helpful; they even have videos to show how to do it and they even include a phone number just in case. Once the thermostat is installed then it is very easy to use, on the thermostat basically just touch to the desired temperature and on the application has a lot more options. I can schedule the temperature so it gets to the right temperature when before I get there. This thermostat is for my office so, sometimes I would forget to change the temperature when I was not there, with this new Sensi I can change it from my phone. The thermostat also gives reminders on when to clean the system as well as change the filters, I like this because I often forget to change the filter. The thermostat does work on Gas, Electric and Boiler/Radiant heat. Also it works with Amazon Alexa, Google Assistant as well as Samsung SmartThings so it is complete. I also like the way it looks, simple, clean and smart. I really like how easy the installation was and also how easy the application is to use.