How to Fix / Troubleshooting

Safety: Stop the microwave immediately if arcing occurs and unplug it.

Remove metal objects: Ensure no metal utensils, foil, or twist ties are inside.
Inspect waveguide cover: Check the mica cover on the side wall for burns, holes, or carbon deposits. Replace if damaged.
Touch-up paint: If small areas of cavity paint are chipped exposing bare metal, clean and apply microwave-safe cavity touch-up paint as recommended by Amica.
Clean cavity: Remove grease and food splatters from walls and ceiling, as carbonized food can cause arcing.
Test carefully: After repairs, test with a cup of water and observe. If arcing persists, have the cavity and waveguide inspected professionally.

Microwave interior shows sparks or arcing during use, especially near the side wall or waveguide cover.

Possible Causes