Napoleon
Excessive Vibration / Imbalanced Blower Wheel
Furnace vibrates excessively and causes rattling in ductwork
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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
Bent or dirty blower wheel, Loose blower housing, Misaligned motor mount, Ductwork not properly supported
How to Fix / Troubleshooting
Safety first: Turn off power before working on the blower.
- Inspect blower wheel: Remove the blower assembly. Check the wheel for bent fins or heavy dust buildup. Clean thoroughly and straighten minor bends carefully.
- Secure housing: Reinstall the blower housing, ensuring all mounting screws are tight and the assembly is square in the cabinet.
- Check motor mounts: Verify that the motor mounting brackets are tight and not cracked.
- Duct support: Inspect nearby ductwork and add hangers or braces where ducts rattle against framing.
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Repair Difficulty
Medium
3/5
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