Safety first: Stop the microwave immediately, unplug it, and open windows to ventilate. Do not ignore burning smells.

Step 1 – Inspect cavity: Once cool, check for burnt food, splatters, or packaging that may have ignited. Clean thoroughly.
Step 2 – Check cookware: Ensure only microwave‑safe containers are used. Some plastics can overheat and melt.
Step 3 – External inspection (advanced): Remove the outer cabinet and look for signs of overheating on the magnetron, transformer, wiring, and PCB (discolouration, melted insulation).
Step 4 – Fan operation: Verify that the cooling fan runs during cooking. A failed fan can cause components to overheat and smoke.
Step 5 – Professional service: If any components show signs of burning, have them replaced by a qualified technician before using the microwave again.

Warning: Do not continue to use the appliance until the source of the burning smell is identified and corrected.

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

Possible Causes