Microwave emits a burning smell or smoke during operation.

Safety first: Stop the microwave immediately, unplug it, and open windows for ventilation. Do not continue to operate until the cause is found.

• Inspect cavity: Look for burnt food, splatters, or packaging. Clean thoroughly with a non-abrasive cleaner.
• Check waveguide cover: If the mica cover is burnt or has holes, replace it.
• Inspect wiring: With the cover removed, look for melted insulation, burnt connectors, or discoloration around the magnetron and transformer. Replace damaged wiring and components.
• Professional evaluation: If the smell originates from the magnetron or transformer area, have a Telefunken technician inspect and replace components as needed.