E23
Zanussi
Defrost sensor/thermostat mismatch or calibration fault
Display shows E23 and the refrigerator does not defrost properly, with repeated ice build-up
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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
Incorrect or incompatible defrost sensor fitted, Sensor not correctly clipped to evaporator, Faulty defrost thermostat, Control board firmware issue
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the evaporator area.
Checks:
- Verify sensor placement: Ensure the evaporator NTC sensor is firmly clipped to the correct part of the coil as per service documentation. Poor contact can cause incorrect readings.
- Check part numbers: If the sensor was recently replaced, confirm it is the correct Zanussi part number for your model.
- Inspect thermostat: If a separate defrost thermostat is present, test it for correct operation (closed when cold, open when warm).
- Reset control: After corrections, unplug for 10 minutes, then reconnect and monitor operation.
Professional help: If E23 persists, the main PCB may require reprogramming or replacement; this should be done by an authorised service centre.
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Repair Difficulty
Hard
4/5
Required Part
Evaporator NTC Sensor / Defrost Thermostat
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