KitchenAid
Start Circuit / Door Interlock Inhibit
Microwave display works but pressing Start does nothing; no relay click, no fan, no light.
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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 switch not signaling closed, failed Start button on keypad, broken door latch, defective main control start relay
How to Fix / Troubleshooting
Safety: Disconnect power before accessing door switches or control panel.
- Door check: Ensure the door is fully closed and not sagging. Lift gently on the door while trying to start; if it starts intermittently, the door switches or hinges are misaligned.
- Keypad test: Try other functions (clock, timer). If some buttons work but Start does not, the keypad may be failing.
- Inspect door switches: Access the door switch assembly and verify that all switches are actuated by the latch and firmly mounted.
- Replace faulty parts: Replace any defective door switch, latch, or keypad assembly as indicated by testing.
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Repair Difficulty
Medium
3/5
Required Part
Door Switch Assembly
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