Microwave interior shows sparks or arcing during cooking, often near the side wall or waveguide cover.

Safety: Stop the microwave immediately if you see sparks. Unplug the unit and allow it to cool.

• Remove metal objects: Ensure no metal utensils, twist ties, or foil are in the cavity.
• Clean cavity: Thoroughly clean the interior, especially around the waveguide cover, to remove grease and food splatter.
• Inspect waveguide cover: If the cover is burnt, cracked, or has holes, replace it with the correct KitchenAid waveguide cover.
• Touch-up paint: If the cavity paint is chipped exposing bare metal, use microwave-safe cavity touch-up paint to cover the area after cleaning and drying.