Paderno Stuck Relay or Door Switch Miswiring

Microwave light, fan, and turntable run when the door is closed without pressing START, or continue running after the timer ends.

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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

Welded power relay contacts, Misaligned or shorted door switches, Control board logic fault, Incorrect wiring after previous repair

How to Fix / Troubleshooting

Safety first: Unplug the microwave immediately. A microwave that runs with the door closed and no command is unsafe.

Step-by-step checks:

  • 1. Do not use: Do not attempt to operate the microwave until the fault is corrected.
  • 2. Inspect door switches: With the cover removed and unit unplugged, check the door switch assembly for broken mounts or misalignment.
  • 3. Check for previous repairs: If the unit was recently serviced, verify that wiring to the door switches and relays matches the Paderno wiring diagram.
  • 4. Control board inspection: Look for signs of overheating around the power relay on the control board.

This condition typically requires replacement of the control board or door switch assembly by a professional.

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Repair Difficulty

Professional Required 5/5

Required Part

Door Switch Assembly
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