Fagor Start Circuit / Control Input Failure

Microwave display works but pressing START does nothing; no relay click, no fan or 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

Defective START button on keypad, Loose keypad ribbon cable, Faulty control board input circuit, Active child lock function

How to Fix / Troubleshooting

Safety: Unplug before removing the control panel.

User checks:

  • Confirm that the door is fully closed and latched.
  • Check if the child lock icon is displayed; if so, disable it per the manual.
  • Try other buttons; if many keys are unresponsive, the keypad may be failing.

Panel inspection (intermediate):

  • Remove the control panel and reseat the keypad ribbon cable on the control board.
  • Inspect for corrosion or damage on the connector.

If the START key remains non-functional, replace the touch control panel assembly or main control board as recommended by Fagor service documentation.

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Repair Difficulty

Medium 3/5

Required Part

Touch Control Panel Assembly
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