Oven fan is very noisy, rattling, or scraping during operation.

Safety first: Disconnect power. Fan blades are sharp; wear gloves.

• Access fan: Remove the rear interior panel to expose the convection fan.
• Check for debris: Remove any loose screws, food debris, or foil pieces caught in the fan.
• Tighten fan blade: Ensure the fan blade nut or screw is tight on the motor shaft.
• Assess bearings: Spin the fan by hand. If it feels rough or wobbly, replace the convection fan motor (often supplied with or without the blade).