Comfortmaker Indoor Blower Mechanical Failure

Comfortmaker indoor unit makes a loud squealing or grinding noise when running.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn blower motor bearings, Loose blower wheel on the shaft, Debris in the blower housing, Bent blower wheel.

Safety: Turn off power to the air handler before removing the blower access panel.

Steps:

Inspect blower wheel: Check for looseness on the motor shaft; tighten the set screw if loose.
Remove debris: Clean out any foreign objects or heavy dust buildup.
Check motor bearings: Spin the wheel by hand; if noisy or rough, replace the motor.
Balance wheel: If the wheel is bent or damaged, replace it to prevent vibration.

Note: Severe noise usually warrants motor and/or wheel replacement.

Medium 3/5

Indoor Blower Motor and Wheel

Check Price on Amazon

We may earn a commission from links on this page.