Microwave emits a burning smell, plastic smell, or electrical odor during or after use.

Safety Warning: If you smell burning plastic or electrical insulation, unplug the microwave immediately and do not continue using it until inspected.

Steps:

• Inspect the interior for burned food, grease, or packaging. Clean thoroughly with mild detergent and water.
• Check the turntable support ring and coupler for melting or discoloration; replace if damaged.
• Inspect the waveguide cover for burn marks or holes; replace if damaged.

If the smell persists with a clean cavity and undamaged parts, an internal component (such as the magnetron or wiring) may be overheating and requires professional diagnosis.