A broken furnace can be expensive, but what if your furnace isn't broken? What if a simple, quick repair will help get your furnace working again? You could save yourself hundreds of dollars in service call costs if you just try a few quick solutions yourself to see if they help get your furnace working again. See below for three repair solutions to try before calling out a furnace repair technician.
Your thermostat is the direct control to your furnace, so you should always check your thermostat first. Make sure it is turned on and that it is set to heat, not something else. If it's turned on, try turning it off and then back on. Change the temperature setting to a couple of degrees higher and listen for the furnace to kick on. If you have a programmable thermostat, check the batteries. Try changing them out with new ones to see if it helps. Pop the front of the thermostat off and look at the wires in the back. One of them may have come loose, which could cause miscommunication between your thermostat and your furnace. If none of these worked to turn your furnace back on, move on to the next solution.
A dirty filter can block air flow to your furnace. You should change your filter every three months, or more often if you have pets living in your home. Turn off your furnace and then take out the filter. Hold it up to the light to see how dirty it is. You should be able to see through it. Replace the filter if it's dirty. Turn your furnace back on to see if that fixes the problem. You can find new filters at your local hardware store. Be sure to replace it with a filter that properly fits with your furnace. A dirty filter can cause your heat exchanger to build up with soot, which can also cause your furnace to run improperly. Look to the next solution on how to clean the heat exchanger.
3. Heat Exchanger
Turn the gas off to your furnace, then unplug your furnace as well. Take off the combustion chamber access panel. Find the heat exchanger according to your furnace manufacturer's directions, and clean any soot off of it using a piece of sandpaper, as it may be burned on. Wipe away any dust or extra dirt inside the chamber using a clean rag. Replace the access panel, plug the furnace back in, and turn the gas back on. Try to turn your furnace on using your thermostat.
If none of these solutions turned your furnace back on, it may be time to call in a professional repair company like Lakeside Heating & A/C Inc.