How To Install A Gas Furnace Thermostat

Whether you have just installed a brand new gas furnace or you are upgrading your thermostat, you might be looking for instructions on installing it yourself. If you only need to replace the thermostat, you may need a professional to handle the job for you. Here are some tips for removing the old gas furnace thermostat and installing a new one. 

Remove the Old Thermostat

Once you have purchased your new thermostat, you need to spend a few minutes carefully removing the old one. Make sure the power to the furnace and the thermostat is turned off. The last thing you want to do is deal with electrocution while removing it. You can turn off the power by heading to your circuit panel and turning of the fuse for both of these appliances. Once you know the power is off, you can get out your screwdriver and remove the thermostat. It is attached to the wall with small screws, so this should be easy to do.

Pull the thermostat box from the wall and expose the wires. You may want to write down how the wires are connected or take a picture of them with your mobile phone so you can reconnect the new thermostat properly. Disconnect the wires one at a time, being careful to grasp them and not let them fall back into the wall. Label any wires that are not colored and write down where they were connected. Once the wires are disconnected, you can remove the mounting plate from the wall.

Install the New Thermostat

When installing the new gas furnace thermostat, you will go in reverse from how you removed the old one. Following this, you want to install the mounting plate first. As you place the mounting plate on the wall, pull the old wires through the hole, then screw it into the wall. You may need to use a level to make sure the mounting plate is level with the wall.

The wires should now be poking through the hole, making it easy to connect them. Use your notes or picture as a guide to placing the wires in the right terminals. Color-coded wires will be easier to connect because the terminal connections on the thermostat will be labeled. Make sure all terminal screws are tightened after connecting the wires. Push any excess amount of wire back into the wall once the connections are complete.

The last step to installing the new furnace thermostat is attaching the cover. Place the cover on top of the mounting place and snap it into place. Attach any screws it has for a secure hold. Turn the circuit back on to the thermostat and test it to make sure it works.

If this doesn’t seem like something you are up to, consider calling a company like Glendale Heating & Air Conditioning.

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