E23
Neff
Low Voltage Supply / 12V or 5V Rail Fault
Display shows E23 and the refrigerator may not cool; fans and compressor may be off.
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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
Failed low-voltage regulator on PCB, Shorted component on low-voltage rail, Loose low-voltage connector to UI or sensors
How to Fix / Troubleshooting
Safety: Unplug the refrigerator before opening any electronic housings.
Procedure:
- Access main PCB: Remove the PCB cover at the rear or top of the appliance.
- Check connectors: Ensure all low-voltage connectors (to UI, fans, sensors) are firmly seated.
- Visual inspection: Look for burnt or cracked components, especially around voltage regulators and small transformers.
- Component-level repair: Component-level repair is not generally recommended for end users. If E23 persists, replace the entire main control board with the correct Neff part.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Low-Voltage Section)
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