Proline Overheating Component or Arcing Damage

Microwave emits a strong burning or electrical smell during or after use.

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.

Possible Causes

Burning food residue on cavity walls, Overheating magnetron or transformer, Arcing at waveguide cover, Failing fan motor

How to Fix / Troubleshooting

Immediate action: Stop the microwave, unplug it, and open the door to ventilate.

User-level checks:

Inspect the interior for burnt food, splatters, or melted plastic and clean thoroughly.
Check the waveguide cover for burn marks or holes.
Smell near the rear or side vents (with the unit unplugged). A strong electrical or plastic smell from vents suggests internal component overheating.

If smell persists without obvious food cause:

Do not continue using the microwave. Have a technician inspect the magnetron, transformer, and fan motor for damage.

Repair Difficulty

Hard 4/5

Required Part

Waveguide Cover

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