E20
Princess Weight Sensor / Load Detection Fault (Models with Weight Sensor)

Microwave displays E20 and some auto-cook or weight-defrost functions do not work correctly.

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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 weight sensor under cavity, Loose sensor mounting screws, Damaged sensor wiring harness, Faulty ADC circuit on control board

How to Fix / Troubleshooting

Safety: Unplug before moving or lifting the microwave.

  • Level the unit: Ensure the microwave is on a stable, level surface. An uneven surface can affect weight sensing.
  • Remove excess load: Do not place heavy items on top of the microwave that could affect internal sensors.
  • Reset: Unplug for 10 minutes, then plug in and recalibrate if the manual describes a calibration procedure.
  • Service: If E20 persists, the internal weight sensor or control board may need replacement.
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Repair Difficulty

Hard 4/5

Required Part

Weight Sensor
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