What causes the LG Er CO error?

Loose or damaged ribbon cable between the control board and display; Power surge or brownout affecting board communication; Failed main control board.

How can I troubleshoot LG Er CO myself?

Unplug the refrigerator for 5 minutes, then plug back in — power cycles often clear Er CO caused by transient surges. Check that the unit is plugged directly into a wall outlet, not a power strip or extension cord.

When should I call a professional for LG Er CO?

If Er CO returns after the power cycle, the control board or ribbon cable needs replacement — a technician job. If the freezer temperature is rising while this code is active, treat it as urgent.

Freezer / Ice Maker Pro Recommended

LG `Er CO` — Communication Error

What does LG Er CO mean?

The main control board and the display board have lost communication. On LG bottom-freezer and French-door models, this can cause the freezer and fridge to stop responding to controls.

What causes LG Er CO?

Loose or damaged ribbon cable between the control board and display
Power surge or brownout affecting board communication
Failed main control board

How to fix LG Er CO yourself

Unplug the refrigerator for 5 minutes, then plug back in — power cycles often clear Er CO caused by transient surges.
Check that the unit is plugged directly into a wall outlet, not a power strip or extension cord.

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