Oven makes loud rattling or scraping noises when the fan is running.

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 housing.
• Remove debris: Check for screws, foil, or food debris caught in the fan blades. Remove any obstructions.
• Tighten blade and housing: Ensure the fan blade nut is tight on the motor shaft. Tighten any loose screws securing the fan housing to the cavity.
• Check bearings: Spin the fan by hand; if it grinds or wobbles, replace the fan motor assembly.