LG Refrigerator er-co error code
The main control board and the display panel stopped communicating with each other. This is an electronics fault, not a cooling fault.
Also shown as: er-co, ER-CO, Er CO, er co
Last updated: October 6, 2026
What causes the er-co error?
- Loose wiring or ribbon cable between the boards
- Power surge damaging a board
- Corroded connector pins
- Failed display board
- Failed main control board
How to fix LG er-co — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Power reset the fridge
Unplug the fridge for 10 minutes, then plug it back in. A power blip can break the board handshake, and a reset often restores it. - Check for a recent power outage or surge
If the code appeared after an outage or storm, the reset is even more likely to work. Consider a surge protector for the fridge outlet. - Inspect the top hinge wiring
On many models the display wiring runs through the top door hinge. With the fridge unplugged, check that the connector there is fully seated and not pinched.Safety warning: Unplug the fridge before touching any wiring.
When to call a technician
- The code returns after a power reset
- The display is dead, flickering, or frozen
- The fridge stops cooling normally
- You smell burning near the control area
Frequently asked questions
Will my food stay cold with Er CO?
Often yes, cooling keeps running while the display misbehaves. But get it checked, since you cannot change settings reliably.
Did a power outage cause this?
Very possibly. Board communication errors often follow surges and outages, and a reset usually clears them.
Can I fix a bad control board myself?
Boards are plug-in parts, but diagnosing which one failed needs a technician. Do not guess and replace both.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.