E20
De Dietrich
General System Fault / Multiple Sensor Error
E20 displayed, ice maker stops and internal alarm sounds continuously
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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
Multiple sensor failures, Control board input circuit fault, Shorted wiring harness, Incorrect mains voltage
How to Fix / Troubleshooting
Safety first: Disconnect power before inspecting wiring or boards.
Basic troubleshooting:
- Verify mains voltage: Use a multimeter to confirm that the supply voltage matches the rating on the De Dietrich nameplate. Incorrect voltage can trigger system faults.
- Inspect harnesses: Open the rear and top panels to access the main wiring harnesses. Look for melted insulation, rodent damage, or loose connectors.
- Check ground connection: Ensure the earth/ground wire is securely attached to the chassis.
- Power cycle: After reseating connectors, leave the unit unplugged for 10 minutes, then reconnect and observe if E20 returns.
Important: Because E20 indicates a broad system fault, if it persists after basic checks, a professional technician with access to De Dietrich diagnostic procedures should be called.
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Repair Difficulty
Professional Required
5/5
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