Whether you are repairing a faulty thermostat or upgrading to one that is programmable, replacing your thermostat is a quick project that can save you a lot in home heating and cooling bills. Old thermostats are not as accurate as modern digital ones, and a thermostat you can program will save you from heating your home when you aren't there. Replacing your thermostat can be accomplished in less than an hour.
- Skill level:
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Things you need
- Replacement thermostat
- Masking tape
Turn off the breaker to the heating unit.
Remove the cover to your thermostat. This is usually as simple as prying it off, but it's possible you may have to remove some screws.
Remove the mounting screws holding the thermostat body to your wall.
Remove the wires going into your thermostat from the terminal block using a small, slotted screwdriver. These wires should be colour coded. However, you should label them according to the letter code on the thermostat, just in case the original installer used a nonstandard system. Use masking tape and a pen to label them.
Replace the wires in your new thermostat, following the manufacturer's instructions. Match the letter code from your old thermostat to the new one.
Attach the new thermostat body to the wall. Replace the cover and turn power back on to the system.
Test the thermostat by raising and lowering the desired temperature to make sure both heating and cooling systems kick on when they should.
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