Oven makes loud rattling or grinding noise when fan is running

Safety: Isolate from mains before removing panels.

• Identify source: Run the oven briefly and listen to locate the noise (rear fan, top cooling fan, or cabinet vibration). Then switch off and unplug.
• Check oven fan: Remove the rear panel inside the oven and inspect the fan blade. Tighten the centre nut if loose and remove any debris.
• Spin test: Rotate the fan by hand. Roughness or play indicates worn bearings; replace the fan motor.
• Secure panels: Tighten any loose screws on internal panels, side trims, and back cover. Ensure shelves and runners are properly seated.