Proline No Start – Door or Relay Control Fault

Microwave display is on but pressing START does nothing; timer may count down without any internal activity.

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

Door interlock switch not closing, Faulty START key on keypad, Failed power relay on control board, Broken door latch hook

User-level checks:

Open and firmly close the door, listening for distinct clicks from the door switches.
Try different power levels and cook times to see if any mode will start.
If the timer counts down but there is no light, fan, or turntable, the power relay or door switch circuit is likely faulty.

Next steps:

Unplug the microwave and have a technician test the door switches and control board relays.

Medium 3/5

Door Interlock Switch Assembly

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