Upon arrival at the customer’s residence, the customer reported the zone was overheating when the thermostat was not asking for heat, we inspected the existing Google Nest thermostat. The wiring was disconnected and reconnected to test whether the zone would activate; the zone did not respond. We then removed the Google Nest thermostat from the first floor and installed it in place of the original thermostat serving the affected zone. After wiring was completed, the zone activated and operated correctly. This confirms the original thermostat is faulty. The customer will need to replace the Google Nest thermostat for that room.
