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