Alpha
Blower or Inducer Bearing Wear
Furnace produces a high-pitched whine or screeching noise 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 rubbing on blower wheel, Failing draft inducer motor bearings, Misaligned blower wheel on Alpha blower housing
How to Fix / Troubleshooting
Safety: Turn off power before inspecting moving parts.
- Identify source: Remove the blower door and briefly run the furnace to determine if the noise comes from the blower or inducer (keep hands clear).
- Inspect blower wheel: With power off, spin the blower wheel by hand. It should rotate smoothly without grinding or wobble. Remove any debris.
- Check inducer: Access the inducer and spin its fan. Any roughness or play indicates bearing wear.
Worn motors typically require replacement of the complete Alpha blower motor assembly or draft inducer assembly by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Alpha Draft Inducer Motor Assembly
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