Cointra
Fan or Inducer Motor Noise
Furnace produces a high-pitched whine or loud humming 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 fan motor bearings, Loose fan wheel, Debris in fan housing, Resonance due to mounting issues
How to Fix / Troubleshooting
Safety: Turn off power before touching the fan or inducer assembly.
Steps:
- Check for debris: Remove the access panel and inspect the circulation fan and combustion fan (inducer) for foreign objects or heavy dust buildup. Clean carefully.
- Tighten mounting screws: Ensure the fan housing and motor mounts are tight and not vibrating against the cabinet.
- Spin test: Rotate the fan by hand. Roughness or play in the shaft indicates worn bearings.
Professional help: Replacement of fan or inducer motors should be done by a technician using Cointra-approved parts to maintain balance and airflow.
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Repair Difficulty
Medium
3/5
Required Part
Circulation Fan Motor
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