Nest Thermostat E Programmable Smart Thermostat for Home, App Controlled via Wifi, Programmable, Compatible with Alexa and Google Assistant, Frosted White Color (T4002ES)

Worked like a champ. Bought others brands with no luck.

I thought I bought a dud of a thermostat. I connected it thinking I would have no problems. Nothing...I didn't realize I had to charge it before using it. It wouldn't connect, wouldn't turn on to let me know it was dead; I just had a black screen. I had to look up why it wasn't working, thinking it might not be compatible. It was since I went from NEST thermostat to NEST thermostat e. I put it on an old phone charger and had to let it charge for a few hours before trying again. Once I installed it again, set up was easy. I'm no technician, but after it was charged I felt like I could take on any electrical device in the home. Thermostat is connected and working properly. Now I can lock my thermostat and keep it locked from my hot-blooded husband.

I can't rate this low enough. The first one I had failed in less than a year but was not covered by warranty because- get this, it was a gift so I wasn't the original purchaser. This one would not connect to the app despite 3 hours of troubleshooting, changing my wifi configuration, creating a new account, etc. I'm so done with Google.

I bought this because I have 5 zones and 3 of the zones are for heating only. The Nest E Thermostat works perfectly and I don’t have to worry about the “C” wire or RC wire. Easy to install and easy to set up with the Google app and the Nest app.

Great for a two wire system (heat only). I can’t speak to A/C but love the item. Love programming it and also being able to change the temp from the app on my way home from work so the house temp is perfect. Only took one star off because it took forever and two unplugs to get it to recognize my WiFi. It could just be my configuration but it was only 30 feet from the router. Once connected, updated and linked to my Google home system, it works like a charm.

I have had several of this exact thermostat over the years, but never had one have such major issues out of the box. This particular one could not be added to my account, connect with WIFI, or be remotely controlled. The battery was so dead out of the box, the thermostat would not turn on. I had to charge it for an hour before even installing it. Then I literally tried for 2 hours to get this to work. Fortunately for me, Amazon accepted it back as a return and I have ordered a replacement. I may update after the new one arrives. Update: The replacement works perfectly. Updating the rating to 5 stars.

If you have a 2-wire system that's heat or cool only, this thermostat will work for you. It will work a system is a millivolt or 24V system. For a millivolt furnace like the Williams Top-Vent Gravity Wall Furnace, you'll need a 24V transformer to act a C wire to provide power to the thermostat. You can search for transformers that work with Nest on Amazon. One such example is the Viivria AC 24 Volt Transformer. Once you have your transformer, 1. Connect the one end of the transformer wire and the red R-wire for your heat/cool to the 'R' terminal. 2. Connect the other end of the transformer to the 'C' terminal. 3. Connect your other wire (likely white) to the 'W' terminal. 4. Put the thermostat back on its base. 4. Plug in the transformer. This configuration should keep your thermostat powered. I've had this configuration for 2 months and it works well.

Great product works like a charm Eady to use and set up

They should inform you that there is some requirement as it not work from the box write away