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Why Is My Furnace Making Weird Noises?

Today’s furnaces should operate fairly quietly. If you’re starting to notice unusual noises from your furnace, it may be time for a service call. At Aladdin Air Conditioning & Heating, we want you to be an informed homeowner. Here are some strange noises and potential causes that you should be watching for!

Noises Your Furnace Could Make & What They Mean

Loud Banging or Popping Noises

A loud banging noise from your furnace is disconcerting, but the good news is that this is rarely a serious emergency. In most instances, a loud banging or popping noise occurs when the metal ducts in the home expand or contract as the blower in the furnace turns on and off. This is not an emergency, but it should be addressed because it can indicate a clogged air filter, closed vent or poorly sized ducts, all of which can impact your furnace’s efficiency.

Another less common cause for a loud banging or “explosion” from the furnace is a dirty furnace burner. This problem is a bit more serious. When the furnace burners are dirty, gas builds up inside the heat exchanger, until when it finally ignites it actually causes a small explosion. This explosion could cause a crack in the heat exchanger, which is a costly repair, so get service right away if you suspect this problem. If you’re keeping up with your regular maintenance, you probably will not have a problem with dirty burners.

Rattling Noises

A rattling sound from your furnace could be due to a gas leak from cracks in the heat exchanger. You should not ignore this. Gas leaks could lead to serious health issues. If you hear a rattling noise, give Aladdin a call right away to have an HVAC technician inspect the system.

Humming Noises

Humming noises from the furnace can mean that the motor is about to kick the bucket. While humming noises can be from other causes, the only way to know for sure is to have an HVAC technician take a look. Replacing the motor before it dies is better than being left cold on a winter evening when your furnace decides to go out.

Squealing Noises

If your furnace is making a high-pitched squealing noise, you may have a problem with the belt in the blower. These noises can also indicate that the bearings in the furnace need to be lubricated. Both of these problems are relatively easy fixes from your Aladdin service technician.

Call Aladdin Air Conditioning & Heating for Furnace Repair in Southern California

Remember, no matter what type of noise you are hearing, if you feel that something is off with your furnace, it’s best to get it looked at by a qualified HVAC technician. Contact Aladdin Air Conditioning & Heating online to diagnose the noises you are hearing and ensure your system is fully functional.


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Office Location

1090 Lawrence Dr. #105
Newbury Park, CA 91320

License #739136


Ventura County


San Fernando Valley