Severin
Door Interlock System Failure
Microwave runs with the door open or starts when the door is closed without pressing START.
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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
Stuck primary door switch, Miswired door switch harness, Shorted control relay, Faulty control PCB
How to Fix / Troubleshooting
Critical safety warning: A microwave that operates with the door open is extremely dangerous. Unplug immediately and do not use until repaired.
- Step 1 – Unplug and quarantine: Disconnect from mains and do not allow further use.
- Step 2 – Inspect door switches: With the cabinet removed, test each door switch with a multimeter to ensure they open and close correctly with door movement. Replace any switch that remains closed when it should be open.
- Step 3 – Verify wiring: Check that the switch wires are connected according to the wiring diagram. Correct any miswiring.
- Step 4 – Check control relay: If switches are correct, the main power relay on the control PCB may be stuck closed and must be replaced along with or as part of the PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Door Interlock Switch Set
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