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What Causes A Furnace To Stop Working?

What Causes A Furnace To Stop Working?

Furnaces experience wear and tear over time During the winter months, these units work continuously to keep you warm and comfortable inside your home – it is only natural that they may malfunction due to problems. A malfunctioning furnace might lead you to look for a heating installation in Magnolia.

Common Reasons Why Your Furnace Stops Working

Understanding why your furnace isn’t working requires identifying some common problems. Here are a few of them:

  • Problem With The Thermostat: Make sure your thermostat is working before moving on to the furnace. Your thermostat controls the heating system, so it might be causing the furnace to malfunction.
  • Make sure the thermostat is turned on.
  • Make sure the thermostat is set to the correct mode of heating.
  • Verify that the temperature settings are set to the required temperature.
  • Make sure the thermostat’s batteries are in good condition.
  • A Flipped Circuit Breaker: During a power surge, the circuit breaker on the furnace can be tripped. Check to see if the switch has not been flipped. If the breaker has been turned off, turn it back on.
  • Furnace Filters Are Clogged: It is one of the most common causes of furnace malfunctions. A clogged filter will restrict airflow from the furnace due to dust, dirt, and debris accumulation. Try restarting the furnace after replacing the dirty filter.
  • Check If The Burners Are Clean: The burners collect dust and dirt over time, which may cause your furnace not to work. Make sure the power is turned off, and attempt to clean the burners with a soft brush or vacuum. Get rid of dirt and debris from the burner by blowing air into it. Try turning on the furnace after replacing the burners and restoring the electricity. If the furnace still does not operate, contact Kahl AC for heating repair in Magnolia.
  • A Faulty Igniter: In the case of a malfunctioning igniter, your furnace might not work properly. These methods can help you determine whether you need to replace the igniter.
  • Open the access panel of the igniter and turn off the power.
  • Check the igniter for chipping, cracking, or fraying.
  • Make sure the igniter plug is working efficiently by using a multimeter. The igniter needs to be replaced if the multimeter reads zero or infinite.
  • Problem With The Pressure Limit Switch: Limit switches are safety devices that monitor furnace temperatures. When a draft inducer motor malfunctions, improper air intake, drainage is clogged, or the switch itself fails, it can cause the switch to stop working.


You can prevent a variety of problems by using these troubleshooting techniques. It is important to remember, however, that proper maintenance is the best way to avoid problems and inconveniences in the future.

If your furnace continues to malfunction after trying these hacks, you will need professional help. Kahl AC is the HVAC contractor you can rely on. We are there 24/7 with our reliable and certified professionals. Contact us today.

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