Microwave produces visible sparks or arcing inside the cavity during cooking.

Immediate action: Press STOP and open the door. Unplug the microwave.

Inspection:

• Remove any metal utensils, foil, or containers with metallic trim.
• Inspect the waveguide cover for burn marks, cracks, or holes. Replace if damaged.
• Check cavity walls and ceiling for chipped or missing paint exposing bare metal.

Repairs:

• Clean the cavity thoroughly to remove grease and food splatter, especially near the waveguide cover.
• Touch up small paint chips with microwave-safe cavity paint following manufacturer instructions.
• Replace the waveguide cover with a Hamilton Beach-compatible part if it shows any damage.

Warning: Continued use with arcing can damage the magnetron and pose a fire risk.