E20
Zanussi
Internal Communication Bus Fault
E20 displayed, internal communication error between main control board and sensor module.
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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
Loose harness between boards, Damaged communication cable, Faulty sensor module PCB, Main control board communication failure
How to Fix / Troubleshooting
Safety: Disconnect mains power before accessing internal electronics.
- Identify modules: Locate the main control board and any secondary sensor or power boards used in your Zanussi ice maker model.
- Check connectors: Reseat all multi-pin connectors between boards. Look for bent pins or corrosion.
- Inspect cables: Examine ribbon cables and harnesses for cuts, kinks, or signs of overheating. Replace any damaged cables.
- Board inspection: Look for burnt components or cracked solder joints on the sensor module. Replace the module if visibly damaged.
- Swap boards if needed: If reseating cables does not clear E20, replace the sensor module first. If the error persists, replace the main control board.
- Test operation: Reassemble and restore power. Confirm that all functions operate and that E20 does not return.
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Repair Difficulty
Hard
4/5
Required Part
Sensor Module PCB / Main Control Board (Zanussi Ice Maker)
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