How To Replace Thermostat Batteries. You will not be able to operate the thermostat is the batteries are dead. Remove the thermostat housing off of the wall plate to which its mounted.
Power on the circuit breaker in the circuit breakers. Replace batt air conditioner if central air thermostat not working. Now you need to place the thermostat on top of the base.
Basic Honeywell Thermostat.
However you will most likely need to replace the thermostat altogether. A thermostat needs batteries for it to function. Shut off the power source to the circuit breakers. Will a thermostat work if batteries are dead.
