If your furnace seems to be malfunctioning because it shuts on and off too fast or it isn't keeping your house warm, the problem could be with the thermostat or the parts in the furnace that control the thermostat.
It's a good idea to check your thermostat when your furnace is malfunctioning just to make sure the settings are correct. If the settings are right, then call a furnace repair company to check your furnace and thermostat to figure out the problem. Here are four reasons your thermostat might not be working.
1. Dust Has Collected Inside The Thermostat
If you've had your thermostat for many years and it's never been cleaned, there might be a lot of dust and grime inside that's interfering with the way the parts work. The furnace repair technician might take the cover off of the thermostat to clean it and solve the problem.
2. Wiring Is Loose
Wires run from your thermostat to the control board in your furnace. If a wire is vibrated loose, the electrical connection will be broken and the signal from the thermostat won't make it to the furnace control board. Tightening the wires should fix this problem. The repair technician may need to tighten wires at the thermostat end or on the control board.
3. The Control Board Is Bad
When the thermostat is malfunctioning, the furnace repair technician can use a multimeter to find out if the problem is with contacts in the thermostat or the control board. A multimeter can also detect when the control board is bad. If the control board can't pick up the signal from the thermostat, then the board has to be replaced.
Replacing a furnace control board can be a difficult repair because there are many wires attached to the board that control a number of parts. The wires have to be removed carefully and then reattached in the right places on the new board.
4. The Thermostat Is Old
Like any other part of your furnace, the thermostat may start malfunctioning simply because it's old and worn out. When this happens, the repair technician will have to replace the thermostat. You might want to choose your own thermostat so you get one with the features you like. You might even want to upgrade to a smart thermostat.
When you've chosen the one you want, the repair technician can install it for you. They'll also make sure the thermostat is mounted in an ideal location for controlling the temperature evenly throughout your house. Reach out to a furnace repair service near you to learn more.