E20
Sharp Steam / Moisture Sensor Calibration Error

Microwave displays E20 and stops; may be associated with sensor cooking only.

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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

Mis-calibrated humidity sensor, Sensor contaminated with heavy residue, Control board sensor calibration fault, Incorrect cavity volume setting (on some models)

How to Fix / Troubleshooting

Safety: Unplug the microwave before any internal cleaning near the sensor.

Steps:

  • 1. Deep clean cavity: Thoroughly clean the interior, especially near the sensor opening. Use mild detergent and water; avoid harsh chemicals. Dry completely.
  • 2. Reset power: Unplug for 5 minutes, then reconnect. Some Sharp models recalibrate the sensor at power-up.
  • 3. Test manual modes: Use time-cook mode to verify that basic heating works. If only sensor modes fail with E20, the issue is isolated to the sensor system.

Advanced: If cleaning and reset do not help, the humidity sensor or control board calibration may be faulty. Replacement of the sensor with a Sharp part is the next step; if that fails, the control board may need service.

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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor
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