- Turn off the old unit and shut off power to your heating and AC system.
- Remove the existing thermostat. This is probably as simple as taking out a few screws and lifting the face off. Don’t get rid of the wall plate just yet.
- Make a note of how all the wires were connected with your old thermostat. You’ll need to know in order to properly install the new device. Taking a picture is a great way to preserve the original setup.
- Disconnect the wires and remove the wallplate.
- Figure out if your new thermostat will easily fit in the space. You may need to remove old wall anchors, patch holes, or make other changes so the new device looks neat.
- Now it’s time to install the new wall plate. Use a level or an app on your smartphone to make sure you’re installing it straight, then drill holes into the wall and secure the wires so they don’t fall out.
- In order to implement the rest of the device, you’ll need to read through the instructions that came with the new thermostat. They will walk you through the process of hooking up the wires, screwing the face into the wall, and setting up the rest. You may need to put in a fresh set of batteries before the thermostat will turn on.
By Duggan's One Hour Heating & Air Conditioning®