Farberware Overheating Component or Cavity Contamination

Microwave has a burning smell or smoke during operation.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Food residue burning on cavity walls, overheated waveguide cover, failing magnetron, wiring insulation burning

How to Fix / Troubleshooting

Immediate action: Press STOP/CLEAR, open the door, and unplug the microwave. If there is visible smoke, ventilate the area.

Inspection and cleaning:

  • Once cool, inspect the interior for burnt food, grease, or splatter. Clean thoroughly with a mild detergent.
  • Check the waveguide cover for burn marks or discoloration; replace if damaged.

If the burning smell seems to come from the cabinet (not the cavity) or persists after cleaning, an internal component may be overheating. Do not use the microwave until it has been inspected by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Waveguide Cover
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