Loud clanking or scraping classified as a metal against metal sound signals a serious problem with the furnace s blower wheel.
Furnace blower wheel loose.
Blower wheels can come loose and hit the blower housing causing a scraping sound.
Took a closer look at motor shaft to try to detect any misalignment couldn t really tell.
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.
The motor shaft and the wheel will be noisy as it turns.
This is not a huge noise just a little annoying.
If you hear this sound turn off your furnace immediately.
Blower wheel was balanced just fine some dirt not horrible.
When your furnace blower wheel is broken it will make your furnace sound like metal scraping against metal and will really hurt your ears.
Older blower wheels will also likely require oil.
Step 4 oil the blower good maintenance on a furnace blower whether it is a direct drive motor or v belt and pulley system is always beneficial in avoiding malfunction.
Check the set screw to ensure that it is properly tightened.
Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing.
If left long enough a loose blower wheel can damage itself and the housing.
Easy to open up and change the blower motor as a unit.
Unit is a bryant 310jav066110acja.
You will most likely need to replace this part on your furnace but don t worry it is a fairly easy repair and can usually be done in an hour or so.
I took it apart replaced with new blower wheel wheel was still not turning true.
Use 3 in 1 motor oil.
Keep one on hand in case you need to change it.
The duct cleaner wanted a couple h.
A broken motor mount causes the blower wheel to drop and rattle against the.
It is made for electric motors.
I did have to change the capacitor on the compressor outside last year and no issues until now.
Squealing caused by a loose belt.
If the set screw is loose the blower wheel will wobble on.
No contact with housing or loose blades.
Really old ones might have grease cups that need to be filled with bearing grease you will probably need to remove the access cover to get at them.
If the belt is loose the pulley on.
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.
Belt driven blower motors call for accurate belt tension to run properly.
Cleaning the blower wheel on a furnace air conditioner takes a little work but is supposed to improve your air quality.
I suspect it s the blower wheel or a bearing in the motor going out.
14 years old at this point but still blowing very cold air.
