How to Fix / Troubleshooting

Safety first: Disconnect mains power. Wait for the fan to stop completely before working.

Identify noise source: Run the oven briefly (if safe) to determine whether the noise comes from the convection fan (inside cavity) or cooling fan (top/rear).
Access the noisy fan: Remove the appropriate cover (rear cavity panel for convection, top/rear panel for cooling fan).
Check for debris: Remove any loose screws, insulation, or food debris from the fan area.
Tighten fan blade: Ensure the fan blade is firmly secured to the motor shaft. Tighten the retaining nut or screw.
Straighten or replace blade: If blades are bent, carefully straighten or replace the fan blade with a Severin part.
Replace motor if bearings worn: If the motor shaft has excessive play or grinding, replace the fan motor assembly.
Test: Reassemble and run the oven to confirm the noise is resolved.

Oven makes loud rattling or grinding noise when fan is running

Possible Causes