Panasonic Cavity Lamp Failure

Microwave interior light does not come on when the door opens or during cooking, but the unit otherwise works.

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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

Burned-out cavity lamp, Loose lamp socket, Faulty lamp relay on control PCB

How to Fix / Troubleshooting

Safety: Lamp replacement often requires removing the cabinet, which exposes high-voltage components. If you are not experienced, have a technician perform the replacement.

User checks:

  • Confirm operation: Ensure the microwave heats and runs normally; only the light is affected.
  • Consult manual: Some models allow user-accessible lamp replacement via a small panel. If so, unplug the unit and follow the manual exactly.

If no user access panel: The lamp should be replaced by a qualified technician to avoid exposure to high voltage.

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Repair Difficulty

Medium 3/5

Required Part

Cavity Lamp
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