Furnace Not Working? Try These Troubleshooting Tips To Fix It

Posted on: 15 July 2019

The heating system in your home should receive regular maintenance checks at least twice a year. It's a good idea to do it at the beginning and end of the winter season. When you fail to do this, your system may malfunction and require serious repairs.

Unfortunately, there are several things that can break on the heating system even with regular checks. This guide goes over some of those issues and how to troubleshoot them.

Furnace Isn't Blowing Hot Air

There are a few things that can result in the furnace not blowing hot air. Check the following things to troubleshoot this issue.


Make sure the fan on the furnace is set to "Auto." If it is in the "On" position, it may be the reason why hot air is not blowing from the appliance.


The filter on the appliance is designed to catch dust and other small particles blowing through it. Over time, it will be too dirty to work properly. Take the filter out, and clean it off with a damp rag until you can see through it.

Certain models may require that you install a new filter every so often. Check the user's manual to see what kind of filter you need.

Pilot Light

The pilot light may have gone out in the appliance. Before you check this out, make sure the heat is turned off completely. Locate the pilot switch, and turn it to the "Off" position.

Leave it off for a few minutes, then turn it back to "On." As you turn it on, use a long lighter, and relight the pilot light. If it doesn't start again, you may need a professional to help.

Furnace Isn't Turning On

Another problem that you may face is a complete lack of power for the appliance. There are multiple things that can be causing this.


Check the breaker box to see if it has tripped. Find the breaker box, and locate the spot marked "Furnace."

If the breaker is switched to the "Off" position, flip it back to "On." Try turning the furnace back on, and see if that works.


Make sure the power for the appliance hasn't been turned off accidentally. Find the thermostat, and check that it's turned to "On." If it is, there is another thing causing the problem.


Sometimes the furnace won't turn on because of the temperature the thermostat is set at. It's designed to stop once the temperature indoors is at the setting of the thermostat. Try turning it up a few degrees to see if it turns on.


You may end up needing a heating contractor if you cannot fix the issues. Contact a local heating repair service for rates and availability.


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