November 18, 2019

Understanding Unusual Furnace Noises: Signs, Causes, and Solutions

Unusual noises may be a warning sign that something’s amiss with your furnace. An experienced HVAC technician can diagnose your issue and perform any repairs that may need to be made. Noises Associated With Blower Wheels A noise that sounds like metal scraping on metal could signify that something’s up with your blower wheel, which is the piece of equipment that blows warm air out of the furnace and helps circulate it through the house. Blower wheels are sometimes called squirrel-cage fans. When furnace air filters go unchanged for too long a period of time, dust can begin to accumulate on the blower wheel. This means your blower wheel has to work harder to do its job. As little as one-tenth of an inch of dust on your blower wheel can decrease the overall efficiency of your blower wheel by a whopping 20 percent. When your blower wheel has to work extra hard to do its job, it has a much higher risk of breaking. A scraping sound could indicate a broken blower wheel motor mount or a loose or broken blower wheel. Whining noises often indicate problems with the blower wheel’s belt or motor. Unusual Noises Associated With Furnace...

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