Microwave produces sparks or arcing inside the cavity during use.

Safety warning: Stop the microwave immediately if you see sparks. Unplug before inspection.

• Step 1 – Remove metal objects: Ensure no metal utensils, foil, or containers are used unless explicitly allowed by AEG instructions.
• Step 2 – Inspect waveguide cover: Locate the mica plate on the side or top wall. If it is burnt, cracked, or has holes, replace it with an AEG-compatible waveguide cover.
• Step 3 – Clean cavity: Thoroughly clean the interior with a mild detergent and soft cloth, removing all grease and burnt-on food. Dry completely.
• Step 4 – Check cavity coating: If enamel is chipped exposing bare metal, avoid using the microwave on high power and consult a technician; some damage may be repairable with approved cavity paint.