LG Refrigerator Error Code DEFROSTING SENSOR OF CR COMPARTMENT

This error code means the Main PCB has detected a fault in the defrost temperature sensor for the CR compartment. The board registers this error when the sensor reports a temperature outside the valid range of -58°F to 122°F. The cause is typically a broken wire, short circuit, failed sensor thermistor, or a missing or disconnected sensor.

A faulty defrost sensor can cause the refrigerator to stop defrosting properly, which leads to frost accumulation on the evaporator and reduced cooling efficiency over time. Food safety could be compromised if the compartment temperature rises significantly. It is best to address the error promptly rather than continuing to run the unit without repair.

A power reset may temporarily clear the error display, but the code will return if the underlying fault is still present. The Main PCB will re-detect the out-of-range sensor reading as soon as it resumes monitoring the circuit. A permanent fix requires identifying and correcting the root cause, whether that is a wiring issue, connector problem, or failed sensor.

Start by measuring the voltage between pins 13 and 14 on Main PCB connector CN 30. A reading between 1.0V and 4.5V means the circuit is functioning; outside that range points to a wiring or sensor fault. Inspect the connector and wiring harness for damage or loose connections first, then test or replace the defrost sensor thermistor if the wiring checks out.

If only the wiring harness or connector needs repair, costs are typically in the range of $50 to $150 for parts and labor. Replacing the defrost sensor thermistor itself usually falls in the $75 to $200 range depending on the part cost and local labor rates. If the Main PCB is also found to be faulty, repair costs increase substantially.