Etna Start Circuit / Safety Interlock Issue

Oven will not start; display works but pressing start does nothing, no error code

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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 start button, door not detected as closed, timer not set correctly, internal relay not energizing

How to Fix / Troubleshooting

Safety first: Internal checks require power isolation; basic user checks can be done with power on.

  • Check door closure: Ensure the door is fully closed and latching. If the door switch is not engaged, the oven may not start.
  • Timer/clock: Confirm that the clock is set and that no automatic program is active that prevents manual start.
  • Test start button: If the button feels unresponsive, the keypad or button PCB may be faulty. Remove the control panel and test the switch with a multimeter. Replace the UI board if necessary.
  • Relay check: If all inputs are correct, the main PCB’s heater relay may not be energizing. Replacement of the main PCB is usually required.
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Repair Difficulty

Medium 3/5

Required Part

User Interface Control Board
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