My forced air fan blower has taken to intermittent bouts of loud squealing. At its worst, everyone in the house wakes up at night, and I have to turn the fan off. It appears to happen after the fan is on for a period of time. I was running it constantly throughout the summer until this started happening.
I think some bearings may be shot. Is there any fix for this, or am I going to have to call an HVAC company to come out and replace the blower?