Originally Posted by EV2RTSE
I did read in the instructions that if you have any jumpers to not use them with the Nest- and this would seem to confirm that as well -
https://support.google.com/googlenest/answer/9250973?hl=en

So installation should be as simple as Red to RH (or just R), Yellow to Y, Green to G, and White to W

I believe power comes from red, are the batteries in your original thermostat just a backup for your settings possibly?

It is fully programmable with the Nest app and you can do away with the turning on and off when you leave the house and just run it more like a regular programmable thermostat. I will be doing the same thing, as my wife is working from home all the time for now whereas I still go in to the office a couple of times per week.

Not trying to sell you on one brand over another.




Was looking into the Emerson Sensi because it's like the one we have now, but with wifi. Battery operated and no C wire required, but not sure how long the batteries last. I usually change all house batteries twice a year when we change time for DST.

https://www.homedepot.com/p/Emerson...Thermostat-for-Smart-Home-ST55/301231478

Sam's also has the Nest Thermostat E on sale for like $80. Not sure if they still have them in stock. Leaning towards the Nest because it's been around and proven, but the Sensi has a 3 year warranty and may not need to cycle the furnace for power.

Current thermostat loses settings and display when batteries are pulled. Not sure if it works or not without batteries. Never tried it.