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Why Isn’t My Furnace Blowing Air?

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Why Isn’t My Furnace Blowing Air?

It helps a lot when you know how your furnace works, even if it’s just the basics. However, when our furnace encounters a problem like it is not blowing air, we tend to perform a DIY repair. If you’re clueless about what to do or how to troubleshoot, call your local HVAC technician for expert help.

But before you call them, read this blog to know why it’s not blowing air.

Check Your Furnace Fan

To check the fan’s functionality, turn the furnace off, then turn the thermostat to fan-only mode. If the fan turns on, the blower fan is not the issue because it’s running on its own properly. If the fan doesn’t turn on, go back and check the circuit breaker and see if it trips. If it does, get an HVAC pro to inspect the unit. There is likely an issue with the unit’s wiring. If the circuit breaker didn’t trip, but the thermostat or the blower motor is failing, an HVAC technician needs to look at the unit.

Check Your Thermostat

If your thermostat is incorrectly set, it will cause your furnace to malfunction—It won’t blow air. You need to check with other people living in the house and ask if they incorrectly set the thermostat’s temperature. If your thermostat is not at the proper temperature, try adjusting it five degrees higher than your home’s current temperature.

If your furnace’s fan still doesn’t turn on, you can check the following:

  • The thermostat should be in “heat” mode instead of “air conditioning” or “fan.” Programmable thermostats might be challenging to locate because they’re sophisticated.
  • Check the date and time of your programmable thermostat. Some have settings that only heat the home at specific times of the day. If your thermostat works incorrectly, it may account for the fan not blowing air when it should be.
  • Replace your thermostat’s batteries. If all else fails, try replacing your batteries, and see if the thermostat is improperly programmed because of a power outage.

Check the Circuit Breakers

Make sure that the circuit breaker connected to the heater is not turned off. It’s not unlikely for the furnace’s fan to have a separate circuit breaker other than the furnace itself, so you need to ensure to check it as well. After reviewing your home’s main circuit breaker, don’t forget to check around the heater and the surrounding area for an on/off switch or another circuit breaker and make sure that it’s on.

Check Your Air Filter

Clogged filters can stop regular furnace operation. If your furnace’s air filter gets clogged with dust and debris, air can’t pass through it to the ducts. We highly recommend replacing your filters every one to three months or so. Also, a clogged air filter causes furnaces to overheat. Modern heaters have an automatic safety shutoff that turns your heating system off when it goes to a specific temperature. If your filter is old, replace it, and check if it fixes the issue.

Are you looking for an HVAC expert to check on your heating system in Thibodaux, LA?  Contact us and talk to one of our experts at A & G Refrigeration Inc. Our skilled technicians are ready to serve your heating needs!

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