Models covered
Protect perishable food whenever safe storage temperatures cannot be maintained. One controlled check is more useful than repeated power cycles or an unverified part order.
Before checking LG GML844PZKV
- Unplug before any accessible cleaning or water-line inspection. Keep water away from electrical parts, never open an internal panel and never use sharp tools inside the ice system.
What this symptom can mean on LG GML844PZKV
3 checks for LG GML844PZKV, starting with Confirm the exact state
- Confirm the exact state
CO communication error. CO indicates lost communication between the main control and display, not a cooling-setting error.
- Carry out the official check
Photograph the code, unplug once for five minutes and reconnect; if CO returns, request LG service without opening a panel.
- Decide from the result
If the symptom clears after the documented check, monitor normal operation. If it returns, preserve the exact model, code, timing and temperature and contact the manufacturer instead of repeating resets or replacing an unverified part.
When to stop checking LG GML844PZKV
- Stop and seek service for smoke, burning smell, electrical heat, exposed wiring, water near a plug, a refrigerant-like hiss with loss of cooling, or temperatures that cannot keep food safe.
Next step
Choose the next step for LG GML844PZKV
For “LG GML844PZKV / LFC24786SD: CO communication error”, base the decision on the documented sequence beginning with “Confirm the exact state”, not on the warning or symptom alone.
Start with Confirm the exact state
Work through all 3 checks for LG GML844PZKV. If normal operation returns and no warning sign remains, the diagnosis ends without ordering a part.
Stop the LG GML844PZKV check at a warning sign
Use the stop conditions above for “LG GML844PZKV / LFC24786SD: CO communication error”. A qualified diagnosis should come before replacing the appliance whenever repair safety or feasibility is uncertain.
Sources used
- LG — LG's official documentation describes “CO communication error” and the bounded user check retained on this page.
- LG — LG's official documentation describes “CO communication error” and the bounded user check retained on this page.
- LG — LG's official documentation describes “CO communication error” and the bounded user check retained on this page.
- LG — LG's official documentation describes “CO communication error” and the bounded user check retained on this page.
Last checked: 30 August 2026