Main thing is look for a W5 "error" on your display. If you have that
error even Google replaced mine. Though the thermostat functions as a
regular thermostat it could not connect to ANY wifi. After a chat Google
traded me a working unit for the on w...
Thanks for the discussion. Should I assume the operating characteristics
of the thermostat's switching transistor(s)/circuit would/should be
determined? Tearing down the thermostat to determinepart numbers
may/probably would void the thermostat's war...