I have a nest thermostat gen 2. It was working fine then all of a sudden started disconnecting and could not connect with the app. After a couple days it said low battery and could not connect to wifi. So I took it off and plugged it in via a usb cord. After sitting on the charger all night I put it back on the wall. Within a couple hours it “died” again and was non responsive. I’ve charged it 4 or 5 times at this point and continue to have the same issue. Now I can’t even get it to respond and turn on the heat.
(I don’t not have a c wire)
Since an update on November 2nd my less than one year old gen 3 Nest Learning Thermostat has now stopped working three times now due to a battery /charging issue. The first two times it actually charged on my desk using its USB port.
When connected to its base and I check its "Power" readouts though its settings menu it shows:
Battery - 3.852 V
Vin - 32.45 V
Vout - 32.45 V
lin - 200 mA(c)
All appear to be expected readouts.
It will no longer charge at all a green LED blinks constantly and the screen displays "Please attach the display to its base".
Prior to Nov 2nd it worked flawlessly.
(I DO have a 'c' wire)