Magic Chef Overheating Component or Cavity Contamination

Microwave interior has a strong burning or electrical smell during or after use.

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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

Burning food residue, Overheating magnetron, Arcing at waveguide cover, Overheated wiring or transformer

How to Fix / Troubleshooting

Immediate action: Stop the microwave and unplug it. Do not continue to run it until the source of the smell is identified.

Cavity inspection:

  • Check for burnt food, grease, or packaging inside the cavity and on the waveguide cover.
  • Clean thoroughly with mild detergent and water.

Internal inspection (if smell persists):

  • Remove the outer cabinet and inspect the magnetron, transformer, wiring, and control board for discoloration or melted insulation.
  • Look for arcing marks near the waveguide and high-voltage connections.

Corrective actions:

  • Replace any burned waveguide cover or damaged wiring.
  • Replace overheating components such as the magnetron or transformer with Magic Chef-approved parts.
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Repair Difficulty

Hard 4/5

Required Part

Waveguide Cover
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