Air handler squeals
Squealing sounds from a forced-air heat pump generally occur when the belt that connects the motor to the fan slips. If the blower is making a grinding noise, shut off the unit and call a heat pump repair technician—the motor’s bearings are probably shot.
In most cases, the belt is improperly aligned or worn and needs replacement. Refer to your owner’s manual.
This job involves removing the access panel, loosening a couple of bolts that hold the blower motor at the proper tension, and realigning or adjusting the belt. In many cases, it’s a good idea to remove it and buy a replacement.
When reinstalling the belt, be careful not to over tighten it as this can wear out the motor bearings.
