LG Refrigerator Error Code Freezer 2nd Digit c

This code indicates a defrost sensor error in the freezer compartment. The Main PCB has detected that the signal from the freezer defrost sensor is outside the acceptable voltage range at connector CN30 pins 2 and 6, which spans 4.5V to 1.0V. The fault can be caused by a loose connector, broken wire, short circuit, or a sensor that has failed internally. It can also trigger if the actual sensed temperature reaches or exceeds +50°C or drops to -50°C or lower.

Continued use is not recommended without addressing the error. A non-functioning defrost sensor means the control board cannot properly manage defrost cycles, which will lead to frost accumulation on the freezer evaporator over time. This frost buildup can block airflow and cause the freezer to lose cooling capacity. Food safety can be at risk if temperatures rise as a result.

A reset may temporarily clear the error code from the display, but the code will return as soon as the Main PCB re-evaluates the defrost sensor signal and finds it out of range. The underlying fault in the sensor, wiring, or connector must be corrected for the error to stay cleared. Resetting without repair does not resolve the defrost cycle issue and can allow frost to continue accumulating.

Start by checking the connector at Main PCB CN30 pins 2 and 6 to confirm it is fully seated and not corroded. If the connector is secure, test the voltage between those two pins to see whether it falls within the 4.5V to 1.0V range. A reading outside this range points to either a wiring fault along the sensor harness or a defective defrost sensor that will need to be replaced. If wiring and sensor both test correctly, the Main PCB may be the source of the fault.

If only the defrost sensor needs replacement, parts typically range from $15 to $60 depending on the specific model, with professional labor adding $80 to $150 on top of that. If the Main PCB is the cause, parts alone can range from $100 to $300 or more, making professional repair more expensive. A loose connector or minor wiring repair completed by a DIYer carries minimal cost beyond tools and time.