Why Does My Furnace Make a Banging Sound?

October 20, 2022
Noisy Furnace in Louisville, KY

If you’ve been hearing a banging noise from your furnace, getting it fixed as soon as possible is important. Several issues can cause the sound, but fortunately, most of them are fairly easy to fix. In this article, we’ll explore why your furnace might be making this sound and provide some tips on getting it corrected.

1. Blower Wheel Malfunction

One of the common reasons a furnace makes a banging noise is that the blower wheel is unbalanced. The blower wheel is responsible for circulating air through your furnace. If unbalanced, it can cause the entire system to vibrate.

2. Something Blocking the Airflow

There could be an obstruction. If something is blocking the airflow to your furnace, it will have to work harder to heat your home, which can cause banging sounds. Common culprits include dirt and dust buildup in the ductwork or a broken blower fan.

3. Defective Heat Exchanger

A banging noise in the furnace implies there may be something wrong with the heat exchanger. The heat exchanger transfers heat from the furnace to your home, and if it’s damaged, it can cause your furnace to make a lot of noise. If this is the case, you’ll need to have a professional inspect and repair your heat exchanger.

4. Loose Hardware

Another common cause of furnace banging is loose hardware. If any of the nuts or bolts that hold your furnace together are loose, it can make the unit vibrate and cause a lot of noise.

Trust the Experts

These are just a few possible reasons your furnace might be making a banging noise. If you’re experiencing this sort of problem anywhere in the Louisville area, we recommend that you reach out to our professionals at Murphy Company Heating & Cooling. We have a conscientious team of NATE-certified technicians, an A+ rating with the BBB, and over 40 years of experience helping homeowners with their furnaces. In fact, we provide a complete range of both heating and cooling installation, repair, and maintenance services, and we’d be happy to help you troubleshoot your problem. Contact Murphy Company Heating & Cooling today for expert help!

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