Haier
Cavity arcing due to metal, damage, or contamination
Microwave interior is sparking or arcing during 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
Metal object or foil in cavity, Damaged or burned waveguide cover, Exposed metal from chipped cavity paint, Food splatter buildup causing hot spots
How to Fix / Troubleshooting
Safety: Stop the microwave immediately if you see sparks. Unplug before inspection.
- Remove metal objects: Ensure no metal utensils, twist ties, or foil are inside unless specifically allowed by the manual.
- Inspect waveguide cover: The small mica or plastic cover on the cavity wall can burn or crack. If it is charred or has holes, replace it with a Haier-compatible waveguide cover.
- Clean interior: Remove heavy food splatters and grease with a mild detergent. Dry thoroughly.
- Check cavity coating: If paint is chipped and bare metal is exposed, arcing can occur. Stop using the microwave and have the cavity professionally repaired or the unit replaced.
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Repair Difficulty
Medium
3/5
Required Part
Waveguide Cover
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