Lennox Blower or Inducer Motor Bearing Failure

Furnace produces a high-pitched whine or screeching noise 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, Worn Lennox inducer motor bearings, Loose or rubbing blower wheel, Debris in inducer housing

Safety: Turn off power before touching moving parts.

1. Isolate noise source: Remove blower door and listen carefully to determine if noise is from the main blower or inducer.
2. Inspect blower wheel: Check for rubbing against the housing or loose set screw on the motor shaft.
3. Temporary mitigation: Tighten loose mounting screws. Do not lubricate sealed bearings.

Motor or inducer replacement is typically required and should be done by a technician.

Hard 4/5

Inducer Motor Assembly

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