LG Refrigerator Error Code CR SENSOR

The CR SENSOR error means the refrigerator's Main PCB has detected a fault in the CR compartment temperature sensor circuit. The sensor is reporting a temperature outside the valid range of -58°F to 122°F, which indicates an electrical problem rather than an actual temperature condition. Common causes include a cut wire, short circuit, loose connector, or a missing sensor housing. The voltage at Main PCB connector CN 30, pins 12 and 14, should read between 1.0V and 4.5V when the circuit is healthy.

Because the Main PCB cannot read accurate temperatures from the affected compartment, it cannot reliably regulate cooling in that section. Food safety may be compromised if the refrigerator is running without proper temperature feedback. It is best to address the error promptly and avoid storing perishables in the affected compartment until the fault is resolved.

A power reset may temporarily clear the error code from the display, but the fault will return if the underlying wiring or sensor problem has not been corrected. The Main PCB will re-detect the out-of-range voltage at CN 30 and trigger the error again once the unit restarts its diagnostic cycle. A permanent fix requires identifying and repairing the actual electrical fault in the sensor circuit.

Some causes are accessible to a knowledgeable DIYer. You can inspect the wiring harness for visible damage, check that sensor connectors are fully seated, and verify the sensor housing is properly installed without any special tools. However, measuring voltage at the Main PCB connector CN 30 requires a multimeter and comfort working near live circuit boards. Replacing a failed sensor or damaged harness section is moderately involved and may be better suited to a qualified appliance technician.

Repair costs depend on the root cause. If only a connector needs reseating, there may be no parts cost, though a service call fee typically ranges from $75 to $150. A replacement temperature sensor part generally costs between $15 and $50 depending on the model. If a wiring harness section needs replacement, total repair costs including labor could range from $150 to $350 or more.