Fraser-Johnston
Blower Motor or Wheel Bearing Failure
High-pitched squealing or grinding noise from the indoor unit.
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Safety Warning
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.
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Possible Causes
Worn blower motor bearings, Misaligned blower wheel, Foreign object in the blower housing, Dry sleeve bearings on older PSC motors
How to Fix / Troubleshooting
Safety: Turn off power to the air handler.
- Access blower: Remove the blower compartment panel and visually inspect the blower assembly.
- Check wheel alignment: Ensure the blower wheel is centered and not rubbing the housing. Adjust the set screw and position if needed.
- Remove debris: Clear any objects or insulation from the blower housing.
- Motor replacement: If the noise is from motor bearings and persists, replace the blower motor with the correct Fraser‑Johnston replacement.
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Repair Difficulty
Medium
3/5
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