How Do You Replace a Thermostat?


Quick Answer

To replace a thermostat, switch off the power to the thermostat, and unscrew the old thermostat from the wall. Fasten the new thermostat, and switch on the power to test it. You need a screwdriver, a utility knife and a new thermostat to accomplish this task.

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Full Answer

  1. Remove the old thermostat

    Switch off the power to the thermostat at the circuit breaker box. Remove the thermostat faceplate, and undo the mounting screws using a screwdriver. Gently pull out the thermostat unit to expose the terminal wires, and use the screwdriver to loosen the wires. Unhook the wires from the screws.

  2. Fix the replacement thermostat

    Using a utility knife, scrape the terminal wire ends until the ends shine, and attach the wires to the new thermostat. The new thermostat must have the same electrical rating as old one. Push the new thermostat back into the wall, and replace the mounting screws to secure the new thermostat. Set the faceplate into place.

  3. Test the new thermostat

    Turn on the power at the circuit breaker unit to see if the new thermostat works. If it doesn't work, unscrew it to check the connection, and fix the problem. Call the expert if it still fails.

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