I've had a NEST for 3 years. Had to replace the Thermostat (if failed). Sensor won't connect. I removed and readded the sensor, changed the battery (even though my tester said the battery was still good), placed the **bleep** sensor ON TOP OF the thermostat (is THAT close enough?)... still won't connect. Getting cold toes here... and a heated brain.
Nest trouble shooter only tells me to do what I figured out and did myself. wow, great support.
i’m sorry that you’re having trouble have you tried by chance going into the thermostat and removing the temperature sensor, then perform a reset of the thermostat, then re-initiate the thermostat, and then try to add the temperature sensor? I hate to say do a reset but sometimes I think giving the thermostat a full enema have a reset works to resolve some problems
Ken, The AC Cooling Wizard