E72
Electrolux
Abnormal Humidity Sensor Reading
Microwave shows E72 when starting sensor reheat or auto cook; cycle aborts immediately.
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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
Shorted humidity sensor, Sensor exposed to excessive moisture, Wiring harness short to ground, Faulty main control board
How to Fix / Troubleshooting
Safety: Disconnect power before inspection.
User-level actions:
- Dry out: Leave the microwave door open for several hours to allow any trapped moisture to evaporate.
- Clean sensor area: Gently clean the area around the sensor port with a soft cloth.
- Try using non-sensor manual cooking modes; if they work normally, the issue is isolated to the sensor system.
Technician-level actions:
- Test the humidity sensor resistance/voltage according to Electrolux service data.
- Inspect the sensor wiring for shorts or pinched sections.
- Replace the humidity sensor if readings are out of specification.
- If wiring and sensor are good, replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
Humidity Sensor
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