C0
Arctic King
Configuration / Optional Sensor Not Detected
Display shows C0; unit may still operate but indicates a sensor or configuration issue.
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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
Missing optional sensor, Loose configuration jumper, Incorrect control board for model, Faulty main PCB
How to Fix / Troubleshooting
Safety: Disconnect power before opening the control box.
Steps to resolve C0:
- Check model configuration: Verify that the replacement control board (if recently changed) matches the exact Arctic King model.
- Inspect jumpers/dip switches: Some boards use jumpers or dip switches to configure sensor options. Compare settings to the service label or manual and correct if necessary.
- Sensor harness: Ensure all required sensors (room, coil, discharge) are connected. A missing sensor can trigger C0.
- Board replacement: If configuration is correct and sensors are present, but C0 persists, replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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