Microwave causes arcing (sparks) inside the cavity during operation.

Safety first: Stop the microwave immediately and unplug it if you see sparks.

• Remove metal objects: Ensure no metal utensils, twist ties, or foil are inside the cavity unless specifically allowed by the manual.
• Inspect waveguide cover: Check the waveguide cover for burn marks, holes, or heavy grease. Replace if damaged.
• Clean cavity: Thoroughly clean any food splatter, especially near the waveguide area.
• Touch up paint: If enamel is chipped exposing bare metal, use a microwave-safe cavity touch-up paint to cover small areas after cleaning and drying.
• Rack inspection: If your Hotpoint model has a metal rack, ensure it is installed in the correct position and not touching the cavity walls.