Microwave emits a burning smell or smoke during operation

Immediate safety action: Press STOP, open the door if safe, and unplug the microwave. Do not continue to operate until the cause is identified.

Step-by-step checks:

• 1. Inspect interior: Look for burnt food, grease buildup, or charred spots on the cavity walls and ceiling. Clean thoroughly with a mild detergent and water once cooled.
• 2. Check waveguide cover: Locate the mica waveguide cover (usually on a side wall). If it is burned, cracked, or has holes, it must be replaced with a Daewoo-compatible cover.
• 3. Remove metal objects: Ensure no metal utensils, foil, or twist ties are used inside the microwave.
• 4. Test carefully: After cleaning and replacing the waveguide cover if needed, test with a cup of water. If smell or smoke persists, unplug and seek professional service.

Warning: Persistent burning smell without visible food residue may indicate internal wiring or component failure and requires technician diagnosis.