Microwave interior or exterior has a burning smell during or after use.

Safety first: Stop the microwave immediately if you see sparks or smoke. Unplug the unit and allow it to cool.

• Inspect interior: Look for charred food, grease buildup, or burn marks on the walls, ceiling, and around the waveguide cover (a small mica or plastic panel on the side or top interior).
• Clean thoroughly: Use a mild detergent and warm water to clean all interior surfaces. Avoid abrasive pads that can damage the coating.
• Check waveguide cover: If the cover is burned, cracked, or has holes, it must be replaced before further use. Do not operate the microwave without this cover.
• Remove metal objects: Ensure no metal utensils, twist ties, or foil are used unless specifically allowed by the manual.
• Next step: If the burning smell persists after cleaning and replacing a damaged waveguide cover, internal components may be overheating. Discontinue use and contact a technician.