Siemens
Convection Fan Mechanical Wear
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
Loose fan blade, Worn fan motor bearings, Foreign object caught in fan
How to Fix / Troubleshooting
Safety: Disconnect power and wait for the fan to stop completely before inspection.
- Check for loose items: Remove trays and racks. Listen again to confirm the noise is from the rear fan area.
- Access fan: Remove the rear inner panel to expose the fan blade.
- Tighten blade nut: Ensure the central nut securing the fan blade to the motor shaft is tight.
- Remove debris: Clear any screws, foil, or food pieces caught around the fan.
- Replace motor: If the noise persists and the shaft has play or feels rough when turned by hand, replace the convection fan motor.
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Repair Difficulty
Medium
3/5
Required Part
Convection Fan Motor and Blade
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