Furnace Blower Wheel Noise

Thumping and vibrating sounds are the results of an unbalanced blower wheel.

Furnace blower wheel noise.

The cause of this noise is usually a problem the furnace s squirrel cage blower wheel. Here are some of the reasons your furnace could be making a funny noise. How to reduce heating cabinet noise. Having one of our techs tighten the blower wheel can often resolve this problem.

A few blower wheel problems include. Blower wheel is loose from the motor wheel. The wheel may have become loose and is making the noise by hitting the blower casing. If you hear this sound turn off your furnace immediately.

The blower wheel blows air out of the furnace and through the house. Sometimes a broken blower wheel can also be the source of this distinct noise. A broken motor mount causes the blower wheel to drop and rattle against the housing. The blower wheel can be making the scraping noise for different reasons.

The blower wheel is attached to the blower motor shaft with a set screw. When your furnace blower wheel is broken it will make your furnace sound like metal scraping against metal and will really hurt your ears. Check the set screw to ensure that it is properly tightened. If the set screw is loose the blower wheel will wobble on the motor shaft and the wheel will be noisy as it turns.

The blower cabinet in most older furnaces is essentially a hollow tin box with a motor and fan hanging from the top. The blower wheel is broken and. My furnace which is 13 years old has 3 8 acoustic soundproofing inside the blower cabinet with a cut out for incoming air. Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing.

Moreover the motor mount. A broken blower wheel will vibrate in its housing resulting in squealing scratching and banging sounds. Get a professional to tighten the wheel.