Aprilaire
Humidifier Fan Motor or Wheel Failure
Aprilaire humidifier fan (on fan-powered models) is noisy, rattling, or squealing
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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, Debris in fan wheel, Loose mounting screws, Bent fan blade or wheel
How to Fix / Troubleshooting
Safety first: Turn off furnace power before opening the humidifier cabinet.
- Inspect fan assembly: Remove the cover and visually inspect the fan wheel and motor. Look for debris, insulation, or wires contacting the wheel.
- Tighten hardware: Check and tighten mounting screws for the motor and fan housing.
- Clean fan wheel: Vacuum dust and debris from the wheel. Ensure it spins freely by hand without wobble.
- Replace motor/wheel: If the motor squeals or the wheel is cracked or badly warped, replace the Aprilaire humidifier fan motor and/or fan wheel as a matched assembly.
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Repair Difficulty
Medium
3/5
Required Part
Aprilaire Humidifier Fan Motor
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