Zanussi Stuck Door Switch or Relay

Microwave interior light stays on even when the door is closed and the unit is not running.

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

Stuck or welded door switch contacts, Misaligned door latch, Stuck lamp relay on control board, Shorted wiring to lamp

Safety first: Unplug the microwave.

Check door closure: Ensure the door closes fully and latches securely.
Test door switches: Access the interlock assembly and test each switch with a multimeter. Replace any that show continuity when they should be open.
Inspect control board: If switches are good, the lamp relay may be stuck closed, requiring PCB repair or replacement.

Hard 4/5

Door Interlock Switch Set

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