Day & Night Blower Motor or Wheel Bearing Failure

High-pitched squealing or screeching noise from indoor unit

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, Blower wheel rubbing housing, Loose blower wheel set screw, Debris in blower housing

Safety first: Turn OFF power to the air handler/furnace before removing blower access panels.

Step 1 – Inspect blower wheel: Check for rubbing marks on the housing and ensure the wheel is centered.
Step 2 – Tighten set screw: Verify the blower wheel is tight on the motor shaft.
Step 3 – Check motor bearings: Spin the wheel by hand. If it feels rough or noisy, the motor bearings are likely failing and the motor should be replaced.
Step 4 – Remove debris: Clean any foreign objects from the blower housing.

Medium 3/5

Indoor Blower Motor and Wheel

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