Termet Blower or Flue Fan Mechanical Noise

Furnace produces a high-pitched whine or loud humming during operation.

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, Debris in flue fan, Loose mounting screws on Termet fan housing, Imbalanced blower wheel

Safety: Turn off power before touching moving parts.

Inspect blower compartment: Remove the blower access panel. Check for loose screws, panels, or foreign objects rubbing against the blower wheel.
Check blower wheel: Spin the wheel by hand. It should rotate smoothly without wobble. Clean dust buildup.
Inspect flue fan: Access the flue fan and check for debris or loose mounting bolts.

Persistent whining or humming usually indicates bearing wear; the blower or fan assembly should be replaced by a technician.

Medium 3/5

Blower Motor Assembly

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