Lochinvar
Blower Bearing Wear / Mechanical Failure
Heater fan or blower is very loud, squealing, or grinding during operation.
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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, Debris in blower wheel, Loose mounting hardware, Imbalanced blower wheel
How to Fix / Troubleshooting
Safety: Turn off power before touching the blower assembly.
Steps:
- Inspect blower: Remove the access panel and visually inspect the blower wheel and housing for debris or rubbing.
- Check mounting: Ensure all blower mounting screws are tight and the housing is not vibrating against the cabinet.
- Spin by hand: With power off, spin the blower wheel. Roughness, grinding, or excessive play indicates bearing failure.
Blower replacement is typically required for bearing issues and should be done by a technician to ensure proper sealing and safe operation.
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Repair Difficulty
Hard
4/5
Required Part
Combustion Blower Assembly
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