Farberware Start Circuit / Door Interlock Logic Failure

Microwave will not start at all; display is lit and accepts time input, but pressing START does nothing.

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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, failed door switch, faulty relay on control board, child lock inadvertently enabled

How to Fix / Troubleshooting

Basic checks:

  • Verify that the door is fully closed and latched; open and close it firmly.
  • Check if a lock icon is displayed; if so, disable child lock per the manual (often by holding STOP/CLEAR for several seconds).
  • Try multiple keys: if only START is unresponsive but other keys work, the keypad may be failing.

Advanced (for experienced DIYers):

  • Remove the control panel and test the START key circuit with a multimeter if you have the keypad matrix diagram.
  • Inspect the door switches and wiring for loose connections.

If the keypad or control board is defective, replace the appropriate Farberware control panel or PCB. If you are not comfortable with internal electrical work, call a technician.

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Repair Difficulty

Medium 3/5

Required Part

Control Panel Assembly
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