Wolf
Cavity Arcing / Waveguide Contamination
Microwave interior shows arcing (sparks) or popping sounds, often near the waveguide cover or metal objects.
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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
Metal object or foil in cavity, Damaged or contaminated waveguide cover, Exposed metal on cavity wall, Chipped or damaged paint exposing metal
How to Fix / Troubleshooting
Safety first: Stop the microwave immediately and unplug it if you see sparks.
Inspection and cleaning:
- Remove any metal utensils, twist ties, or foil from the cavity. Wolf microwaves should only be used with microwave-safe cookware.
- Inspect the waveguide cover for burn marks, bubbling, or holes. Clean gently with a damp cloth if only lightly soiled.
- Check the cavity walls and ceiling for chipped paint exposing bare metal.
Next steps:
- If the waveguide cover is burned or damaged, it must be replaced before further use.
- If paint is chipped to bare metal, the cavity should be evaluated and repaired by a technician to prevent further arcing.
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Repair Difficulty
Medium
3/5
Required Part
Waveguide Cover
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