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Blower Bearing or Motor Failure
Furnace blower is noisy with a high-pitched squeal or grinding sound.
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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, Loose blower wheel on shaft, Debris in blower housing, Misaligned blower assembly
How to Fix / Troubleshooting
Safety: Turn off power before accessing the blower.
Steps to check:
- Inspect blower wheel: Look for rubbing marks on the housing. Ensure the wheel is centered and set screws on the shaft are tight.
- Check for debris: Remove any foreign objects from the blower housing.
- Spin test: Gently spin the blower wheel by hand. Roughness or grinding indicates bad motor bearings.
When to call a pro: Blower motor or wheel replacement should be done by a technician to ensure proper balance and airflow.
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Repair Difficulty
Hard
4/5
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