Furnace noise
Furnace has gotten louder - hard to describe but like something is loose and vibrating when fan motor is running. I took the outside cover off and didn't' see anything obvious - the fan doesn't appea...
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Our fan was getting noise and did sound like excessive compression noise. Ours had bushings and it is really not lubable, besides it is a pain to get to. Suddenly the compression noise change to a squeal, a very loud squeal, a banshee loud squeal, at 2:00am in the Black Hills with an outdoor temp of 19 degrees. We're from So Cal and had no backup heater. Now we have a new motor and it no longer wakes me up. A motor with bearings instead of bushings and a very clean squirrel cage fan. So yes a motor with dry or bad bushings can make some funny noises.
