How To Quiet A Noisy Furnace Blower Expert Tips And Tricks Locate the belt connecting the blower motor and the blower wheel. inspect the belt for wear, fraying, or damage. if it appears worn or damaged, replace it with a new one. ensure the belt is properly tensioned. a loose belt can slip and create noise, while a belt that is too tight can cause strain on the motor. Step 1: power off. turn the power off to the furnace and locate the furnace blower motor. locate and take note of the furnace blower location, as well as where each wire is. you may want to take a picture with your mobile phone to note the wire location.
How To Quiet A Noisy Furnace Blower 10 Easy Ways 6. check the blower motor belt. many quiet furnace blowers are belt driven, similar to a car’s engine. a dirty, misaligned, and or slipping belt can make squealing noises. in a worst case scenario, the belt can slip off or even break. clean the belt with a clean cloth and make sure it’s properly aligned. Adjusting the fan speed can help eliminate the noise from your furnace blower. oiling the blower motor: use 3 in 1 motor oil to lubricate the blower motor axle. note that some blower assemblies have removable plastic cops on each end. remove them and squirt a few drops of oil into them. Make sure you order the correct one. scraping – the sound of metal rubbing on metal. this can be caused by a loose or broken motor mount, a loose or broken blower wheel, or loose pulleys that are touching the motor housing or squirrel cage housing. inspect all of these. make sure all parts are tight. It may be possible to reduce the noise level by changing the furnace or blower enclosure. blower enclosures made of metal can cause more noise than plastic, fiberglass, or other materials. blower covers with sound attenuation materials can reduce blower noise up to 10 db (a). a quieter running motor will run at less power, reducing energy.
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