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

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

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.

Possible Causes

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

How to Fix / Troubleshooting

Critical safety warning: This condition may indicate that high voltage is being applied while the door is 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, and correct any miswiring.
2. Test switches: Replace any switch that does not change its state correctly.
3. Check control board relays: If the wiring and switches are correct, a stuck relay on the control board may be incorrectly energizing the high-voltage (HV) circuit. Replace the control board.

Repair Difficulty

Professional Required 5/5

Required Part

Door Switch Kit

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