Er
Dometic
General Control Board or Display Error
Display shows "Er" or generic error; unit may beep and stop responding to some controls.
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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
Firmware glitch in control PCB, corrupted EEPROM, power surge damage, loose display harness, failed display PCB
How to Fix / Troubleshooting
Safety: Disconnect power before opening any control compartments.
Steps:
- Power cycle: Unplug the wine cooler for at least 10 minutes to allow capacitors to discharge. Plug back in and check if the error clears.
- Inspect control connections: Remove the control panel and verify that all connectors to the display PCB and main control PCB are fully seated and free of corrosion.
- Check for moisture: Look for signs of condensation or liquid spills on the control boards. Dry carefully with a low-heat hair dryer at a safe distance if needed.
- Replace board: If the error persists and no wiring issues are found, replace the main control PCB first. If still unresolved, replace the display PCB.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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