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I hear a squealing noise coming from my forced-air furnace. Whats that about?

April 26, 2017coming forced-air furnace hear noise squealing

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Posted

I hear a squealing noise coming from my forced-air furnace. Whats that about?

2 Answers

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Smith Watson Posted

It is most likely to be the fan belt. -Yes, it’s the same as the fan belt in car! It’s probably loose, so when the motor starts, it slips on the fan pulley, and causes that squeal.

http://hvachome.blogspot.com/2013/12/how-to-take-care-of-hvac-system.html

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Posted

Squealing sounds from a forced-air furnace generally occur when the belt that connects the motor to the fan begins to slip. This could mean the belt is improperly aligned or worn and needs to be replaced. Follow the instructions in your owner’s manual. If you don’t have one, contact the manufacturer and ask for one, or check the manufacturer’s website on the Internet. But if you hear more of a grinding type of sound, shut your furnace off immediately! It could be that the motor’s bearings are shot and your motor will need to be replaced.