Lg Refrigerator Error CO

⚡ Quick Answer: The LG refrigerator CO error code signifies a communication failure between the main control board and the display board, often resulting in disrupted... ✅ DIY Fixable

What Does Error CO Mean?

The LG refrigerator CO error code signifies a communication failure between the main control board and the display board, often resulting in disrupted operation and unusual humming sounds. This internal electronics fault can prevent the refrigerator from responding normally, indicating a need for inspection or repair.

Common Symptoms:

  • Error code “CO” shown on display panel indicating control/display communication issue
  • Refrigerator operation may be disrupted or not respond normally

Possible Causes

  • Communication failure between main control board and display board (high)
  • Loose or faulty wiring between control board and display (medium)
  • Faulty display PCB or control board hardware component (medium)

How to Fix Error CO

DIY Fix Basic power reset and observation

  1. Disconnect refrigerator from power by unplugging or switching off circuit breaker
  2. Wait ~5 minutes to allow capacitive discharge
  3. Reconnect power and observe if error clears

Technician Only Inspect and repair control/display communication

  1. Disconnect power and remove necessary covers to access control board and display board
  2. Inspect wiring harness between main board and display for loose or damaged connectors
  3. Reseat or replace wiring harness if necessary
  4. If wiring is intact, test or replace display PCB or main control board

Parts needed: Wiring harness between main control board and display, Display PCB, Main control board

🛑 When to Call a Pro:
  • If error persists after power reset and basic checks
  • If internal wiring or components appear damaged
  • If you are not confident safely accessing internal electronics

Technical Specifications

wattage 200W
component Compressor
resistance 5-10 ohms
part_number LG 4681JA2004B
voltage_rating 120V AC

Common Questions

What does CO error mean on lg refrigerator?

The CO error indicates a communication failure between the main control board and the display, disrupting normal operation.

Can I fix lg refrigerator CO error myself?

Yes, you can perform a basic power reset by unplugging the refrigerator for about 5 minutes to see if the error clears.

How much does it cost to fix CO error?

The estimated cost to fix the CO error ranges from $80 to $350, depending on the repair needed.

When should I call a technician for CO?

Call a technician if the error persists after a power reset, if you notice damaged wiring, or if you're not comfortable accessing internal components.

Sources & References

Data last verified: 2026-01-10

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