Question: how to replace air conditioner thermostat?
Answer: Turn Off Power to A/C and Furnace. Better to be safe than sorry. ... , Remove Face of Old Thermostat., Take a Picture of the Wires. ... , Disconnect Wires from Old Thermostat. ... , Remove Old Mount., Put on the New Thermostat Mount and Connect Wires. ... , Screw Faceplate Mount to Wall. ... , Attach New Thermostat Face.