Kuppersbusch
Fan Motor Bearing Wear / Obstruction
Oven makes loud rattling or grinding noises when the fan is running.
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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 convection fan motor bearings, loose fan blade, foreign object caught in fan, bent fan blade rubbing housing
How to Fix / Troubleshooting
Safety first: Disconnect power and wait for the fan to stop completely before inspection.
- Access fan: Remove the rear panel inside the oven cavity to expose the convection fan and blade.
- Check for debris: Remove any loose screws, foil, or food debris caught in the fan area.
- Blade inspection: Ensure the fan blade is tight on the shaft and not bent. Straighten minor bends carefully or replace the fan blade.
- Motor test: Spin the fan by hand; roughness or play indicates worn bearings. Replace the convection fan motor if noisy.
Tip: Avoid using loose foil in the oven; it can be drawn into the fan and cause noise or damage.
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Repair Difficulty
Medium
3/5
Required Part
Convection Fan Motor
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