ER CO

Display to main board communication error

Home Appliance Error Codes LG Refrigerators Short guide

Can you still use it? With care until repaired

Typical cost SAR 200 to 1,500

What it means

On LG refrigerators, Er CO commonly means the display panel has lost communication with the main control board. The fridge may keep cooling or be affected depending on the case. The meaning can vary by model, so check the manual for your fridge.

Symptoms3

The display does not respond or keeps showing the code.
Changing settings has no effect.
Cooling may weaken in some cases.

Possible causes4

Loose connector or wire at the top door hinge where the cable runs.
Wiring worn from repeated door opening.
Failed display board.
Failed main control board.

How to diagnose and fix3

Unplug the fridge for ten minutes, then restart it.
Check whether the fridge is still cooling normally.
Have a technician inspect the hinge wiring, then the boards.

Repair cost

0–200

200–600

600–1,500

1,500+

In Saudi riyals; the highlighted part is the expected range for this fault.

Fixing a wire or connector is far cheaper than replacing the display or main board.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.

Frequently asked questions

Is my food at risk?

Not if cooling stays normal, but monitor the temperature until repaired.

Can a power cut cause it?

It can appear after a power disturbance; if it clears after a restart it was likely a one-off.

This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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