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Why Is My Furnace Screeching?

There’s cause for concern any time the furnace is making a high-pitched noise. The problem could be the result of a broken blower wheel or something as simple as an air leak. No matter the cause, it’s important to fix it as soon as possible. Keep reading to learn the possible causes of a screeching furnace in your Pinson, Alabama, home and what to do about it.

Broken Blower Wheel

A broken blower wheel will lead to the sound of metal scraping against metal. Turn the heating system off immediately if you hear this sound, and contact One Source Heating & Air Conditioning.

Although replacing a broken blower wheel is fairly simple, it’s important to let a professional do it. A blower wheel that is out of balance, but not broken, can also cause the furnace to produce a screeching noise. The noise is similar to how a washing machine screeches when its agitator is out of balance.

An Air Leak

Does the screeching noise resemble a high-pitched whistling sound? If so, there may be an air leak in your home’s ductwork. Cleaning the ductwork is important because it deteriorates over the years. Air leaks in the duct system will increase heating expenses and put unnecessary wear and tear on the heating system. A professional HVAC contractor can easily repair the leaks.

Dirty Burners

If the noise you’re hearing comes in the form of loud screeching and bangs, the furnace’s burners are likely dirty. Dirty burners result in a delay in ignition, causing gas to build up and ignite immediately once the furnace kicks on; this is what produces the loud bang. Essentially, it’s like a small explosion taking place inside the furnace.

Preventative furnace maintenance can prevent this from happening. An HVAC technician will inspect and clean the burners as needed during preventative maintenance sessions.

One Source Heating & Cooling specializes in a variety of heating system installation, repair, and maintenance services. Contact us today at (205) 509-1929 if your furnace is screeching, and our technicians will attend to your needs.

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