3rd gen Nest Thermostat has been working fine for the last couple years.
Now get message low battery, can't connect to WiFi. Charged on USB and
device got very warm. Still shows low battery/can't connect when put
back on base.
Had wiring, power checked by electrician. Moved the thermostat from
upstairs to downstairs and still the same issue. Low battery, charged on
USB, unit says to put back on base, unit gets hot from charging then
when back on base thinks the room is HOT...
