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

Safety: Immediately stop the microwave, unplug it, and keep the door closed if there is active smoke. Allow any flames to extinguish; do not open the door until it is safe.

Steps to address burning smells:

• 1. Inspect interior: Once cool, open the door and inspect for burnt food, splatters, or melted plastic. Remove all debris.
• 2. Check waveguide cover: Examine the mica waveguide cover (usually on the side wall). If it is burnt, charred, or has holes, it must be replaced before further use.
• 3. Clean thoroughly: Clean the cavity with a mild detergent and water. Avoid harsh abrasives that can damage the enamel.
• 4. Test with water only: After cleaning and replacing any damaged waveguide cover, test with a cup of water. If burning smell persists or arcing is seen, stop use.

If the smell is electrical (sharp, chemical) or accompanied by visible arcing from vents or behind panels, discontinue use and have a technician inspect the magnetron, wiring, and internal components.