Proline Cavity Coating Degradation

Microwave interior paint is peeling, rust is visible, or there are dark burn marks on the cavity walls.

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

Long-term moisture and food acid exposure, Mechanical damage from scrubbing or impacts, Arcing at exposed metal spots

User-level steps:

Clean the cavity thoroughly with mild detergent and a soft cloth; avoid abrasive pads.
If small rust spots are present, stop using the microwave until they are treated, as they can cause arcing.

Next steps:

A technician can sand and treat small areas with microwave-safe cavity paint. Extensive rust or damage may require cavity replacement, which is often not economical.

Medium 3/5

Cavity Touch-Up Paint

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