Microwave emits a burning smell or visible smoke from the interior during or after cooking.

Safety: Stop the microwave immediately, open the door, and unplug the unit. If there is active fire, follow emergency procedures and do not open the door until flames are out.

User-level steps:

• Inspect interior: After cooling, check for charred food, melted plastic, or burned spots on the cavity walls or waveguide cover.
• Deep clean: Thoroughly clean the interior with a mild detergent and water. Remove all grease and residue.
• Waveguide cover: If the cover is burned, cracked, or has holes, it must be replaced before further use.

Technician-level steps:

• Replace the waveguide cover with the correct Electrolux part.
• Inspect the cavity and waveguide for damage; if the metal cavity is burned through or heavily pitted, the unit may be unsafe to repair.