Oven produces unusual noises such as grinding, rattling, or squealing during operation

Safety first: Turn off power and allow the oven to cool before investigating noises.

• Identify noise source: Run the oven briefly and listen to locate whether the noise is from the rear (convection fan), top (cooling fan), or door area.
• Inspect convection fan: Remove the rear interior panel and check the fan blade for looseness or contact with the shroud. Tighten mounting screws and remove any debris.
• Check fan motor: Spin the fan by hand; roughness or play indicates worn bearings. Replace the convection fan motor if noisy.
• Secure panels: Tighten any loose screws on outer panels, racks, and trim pieces that may rattle.