Steps to Take When Replacing a Home Thermostat

Steps to Take When Replacing a Home Thermostat If you’re replacing your home thermostat, you can save some money by doing it yourself. While some homeowners may be skilled enough to do the job, be aware that if your replacement is a more sophisticated model, you may have some wiring issues. Use your best judgment as to whether or not you need to hire an electrician. 

In the following guide, we’ll explain in general terms what to do when replacing a home thermostat.

  • Cut the power to your furnace at the circuit breaker, and then remove the housing from the old thermostat. Afterwards, remove the screws from the old thermostat, and pull away until you see the wires.
  • You should see three or four wires in differing colors. Label these wires with the letter of the terminal from which you’re disconnecting them from. You can disconnect by loosening the screws holding them in place. You may also want to tape wires to the wall.
  • After lining up the new mounting plate and drilling new holes if needed, connect the wires to the terminals of new thermostat.
  • If your new thermostat has more wires than you have coming from the wall, get an electrician to install an additional wire. Carefully follow any additional instructions regarding mismatched wires to avoid damaging your electrical system.
  • After your service pro has connected the new wiring to the furnace and turned the power on, you can connect the face plate to the thermostat unit. If you don’t need an extra wire installed, you can simply connect the face plate.

If you’re replacing an old mercury thermostat, go online to find out how this should be done. If you hire an HVAC contractor to install your new thermostat, he or she will be happy to dispose of it for you.

To learn more about replacing a home thermostat, or to find out how a programmable thermostat can increase efficiency, contact Davis Air Conditioning in Southwest Oklahoma.

Our goal is to help educate our customers in the Lawton and Duncan, Oklahoma area about energy and home comfort issues (specific to HVAC systems).

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