ER CO or communication error on some Café models; display may be erratic and cooling may stop.

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.

Possible Causes

Loose communication cable, Damaged harness at door hinge, Failed display board, Failed main control board

Safety first: Disconnect power before accessing any control components.

1. Reset power: Unplug for 5–10 minutes, then plug back in and check if the error returns.
2. Inspect hinge wiring: At the top of the door, inspect the harness for damage or disconnection.
3. Check board connectors: At both the main board and display board, ensure communication connectors are fully seated.
4. Replace faulty board: If wiring is intact and the error persists, one of the boards is likely defective and should be replaced with OEM parts, ideally by a technician.

Professional Required 5/5

Main Control Board

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