E20
Paderno Clock Timing Reference Error

Microwave displays E20 and the clock or timer runs erratically fast or slow.

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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 timing crystal on control board, Power supply ripple affecting timing, Control board firmware fault, Electrical noise from nearby devices

How to Fix / Troubleshooting

Safety first: Unplug the microwave before accessing the control board.

Step-by-step checks:

  • 1. Verify power quality: Avoid using the microwave on circuits shared with large motors or dimmers that can introduce noise.
  • 2. Power reset: Unplug for several minutes, then plug back in and set the clock again.
  • 3. Observe behavior: If the clock continues to drift significantly or E20 reappears, the timing circuit on the control board is likely defective.
  • 4. Replace control board: For most users, replacing the main control board is the only practical repair.
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Repair Difficulty

Medium 3/5

Required Part

Main Control Board
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