Microwave produces sparks or arcing inside the cavity during cooking.

Safety first: Stop the microwave immediately by pressing STOP/CLEAR and unplug it. Do not continue to operate while arcing occurs.

Steps:

• 1. Remove metal objects: Ensure there is no aluminum foil, metal cookware, or twist ties inside.
• 2. Inspect waveguide cover: Locate the waveguide cover (usually a small mica or plastic panel on the side wall). If it is burnt, cracked, or has holes, it must be replaced.
• 3. Clean cavity: Thoroughly clean the interior with a mild detergent to remove grease and burnt food. Pay special attention to corners and around the waveguide cover.
• 4. Touch-up paint: If small chips in the cavity paint expose bare metal, use microwave-safe cavity touch-up paint to cover them, following the product instructions.

Note: Persistent arcing after cleaning and replacing the waveguide cover may indicate deeper damage to the waveguide or magnetron and should be evaluated by a technician.