Avanti Incorrect Door Switch Sequencing / Potential Live Operation with Door Open

Microwave cavity light and fan turn on when door is opened, but unit also makes a buzzing sound as if trying to run.

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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

Miswired door switches, Failed monitor switch, Shorted control relay, Incorrect previous repair

How to Fix / Troubleshooting

Critical safety warning: This condition can indicate that high voltage is being applied with the door open. Unplug the microwave immediately and do not use it.

Steps (technician recommended):

  • 1. Inspect door switch wiring: Verify that each switch is wired according to the Avanti wiring diagram. Correct any miswiring.
  • 2. Test switches: Replace any switch that does not change state correctly.
  • 3. Check control board relays: If wiring and switches are correct, a stuck relay on the control board may be energizing the HV circuit incorrectly. Replace the control board.
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Repair Difficulty

Professional Required 5/5

Required Part

Door Switch Kit
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