A broken motor mount causes the blower wheel to drop and rattle against the housing.
Furnace blower wheel noise.
The blower wheel is broken and needs replacing.
Shut your furnace off if you have a compromised mount.
Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing.
A few blower wheel problems include.
The motor itself can also become out of balance.
The motor mount broke causing the whole blower assembly to drop and hit the housing.
A broken blower wheel will vibrate in its housing resulting in squealing scratching and banging sounds.
Sometimes a broken blower wheel can also be the source of this distinct noise.
Blower wheel loud clanking or scraping classified as a metal against metal sound signals a serious problem with the furnace s blower wheel.
When your furnace blower wheel is broken it will make your furnace sound like metal scraping against metal and will really hurt your ears.
The wheel may have become loose and is making the noise by hitting the blower casing.
The cause of this noise is usually a problem the furnace s squirrel cage blower wheel.
Have a pro take a look to avoid further damage to your furnace.
Here are some of the reasons your furnace could be making a funny noise.
If you hear this sound turn off your furnace immediately.
Get a professional to tighten the wheel.
Thumping and vibrating sounds are the results of an unbalanced blower wheel.
If you hear this noise turn off your furnace immediately to prevent any further damage to the furnace.