How do I replace an old Honeywell thermostat?
Remove Old ThermostatDisconnect power from the thermostat by turning off the breaker or switch to the unit. Remove the faceplate of the old thermostat and remove the screws holding the thermostat to the wall. Disconnect the wires from the thermostat, taking care to mark the wires so you know where they connected to the old thermostat.Install New ThermostatRefer to the instruction manual included with the thermostat or find the manual online using the link in the Resources section. Attach the wires to the new thermostat using the color of the wire as a guide and refer to your old thermostat if the colors do not match. If you are unsure where a wire should go, you may need to contact a professional.
