Microwave heats, but there are visible sparks or arcing inside the cavity, often near the side wall or mica cover.

Safety first: Stop the microwave immediately if you see sparks. Unplug before cleaning or inspection.

• Step 1 – Remove metal objects: Ensure no metal utensils, foil, or containers are inside. Use only microwave-safe glass or ceramic.
• Step 2 – Clean the cavity: Wipe the interior with warm soapy water, focusing on the area where arcing occurred. Remove all grease and carbonized food. Dry thoroughly.
• Step 3 – Inspect mica cover: Locate the small rectangular mica cover on the side wall. If it is burnt, cracked, or has a hole, replace it with a Severin-compatible mica waveguide cover cut to the same size.
• Step 4 – Check enamel: Look for chipped enamel exposing bare metal. Small chips can be touched up with microwave-safe cavity paint; larger damage may require cavity repair or replacement of the unit.
• Step 5 – Test: After cleaning and replacing the mica cover, test with a cup of water. If arcing persists, discontinue use and consult a technician.