Oven makes loud rattling or grinding noise when fan is running

Safety first: Disconnect power before removing any covers or fan guards.

• Identify which fan: Listen to determine if the noise comes from the rear convection fan (inside cavity) or the top cooling fan.
• Check for obstructions: Remove the rear fan cover inside the cavity and clear any loose screws, foil, or debris contacting the fan blade.
• Tighten fan blade: Ensure the fan blade nut is tight on the motor shaft. Re‑secure if loose.
• Motor bearing check: Spin the fan by hand. Roughness or play indicates worn bearings. Replace the affected fan motor assembly.
• Cooling fan mounts: From the top, tighten any loose mounting screws or brackets on the cooling fan.