Salter Door Switch or Control Relay Stuck

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

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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

Faulty door interlock switch, Stuck lamp relay on control PCB, Misaligned door latch

How to Fix / Troubleshooting

Safety: Unplug the microwave when not in use to avoid overheating the cavity.

Steps:

  • 1. Check door closure: Ensure the door closes fully and latches with a firm click. If it feels loose, the latch or hinges may be worn.
  • 2. Clean latch area: Remove debris from the latch openings that might prevent full switch actuation.
  • 3. Power reset: Unplug for 10 minutes to reset the control PCB. If the lamp still stays on after plugging back in, a switch or relay is likely stuck.
  • 4. Professional repair: A technician should test the door switches and the lamp relay on the control PCB and replace the faulty component.
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Repair Difficulty

Hard 4/5

Required Part

Door Interlock Switch
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