KitchenAid Start Circuit / Door Interlock Inhibition

Microwave display works, but pressing Start does nothing; there is no relay click, no fan, and no light.

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

Faulty door switch not signaling 'closed', failed Start button on the keypad, broken door latch, or a defective main control start relay.

Safety: Disconnect power before accessing door switches or the control panel.

Door Check: Ensure the door is fully closed and not sagging. Gently lift the door while attempting to start the microwave; if it starts intermittently, the door switches or hinges are misaligned.
Keypad Test: Try other functions (e.g., clock, timer). If some buttons work but the Start button 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 are firmly mounted.
Replace Faulty Parts: Replace any defective door switch, latch, or keypad assembly as indicated by testing.

Medium 3/5

Door Switch Assembly

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