LG Refrigerator Error Code Sensor blink

The Sensor blink error means the refrigerator has detected a failure in one or more of its temperature sensors, either at startup or during operation. The display blinks the region associated with the faulty sensor to help identify which area is affected. When this occurs during operation, the unit switches to Emergency Operation mode to maintain basic cooling while the fault is present.

When the sensor failure is detected during operation, the refrigerator enters Emergency Operation mode and continues running the compressor and fans on a fixed cycle. This provides some food protection, but temperature regulation is no longer precise. If the error persists for more than a few hours, use a standalone thermometer to verify compartment temperatures and consider moving perishables if readings are unsafe.

Repair costs vary depending on which sensor has failed and whether any wiring or control board work is needed. A thermistor replacement is generally an affordable repair, with parts typically ranging from a few dollars to around thirty dollars and labor adding to the total if a technician is involved. If the main control board is determined to be the cause, total repair costs can range from one hundred fifty dollars to over three hundred dollars depending on the model and labor rates in your area.

Some causes, such as a loose connector or ice buildup around a sensor, can be addressed without special tools. However, properly diagnosing which sensor has failed requires following the self-diagnosis procedure and testing resistance at the sensor and wiring harness. Replacing a thermistor is a moderate repair that many experienced DIYers can complete, but if the control board is involved, professional service is recommended.

A power reset, performed by unplugging the unit for a few minutes and restoring power, may temporarily clear the blink if the fault was caused by a transient condition such as a loose connector making intermittent contact. However, if the underlying sensor or wiring has physically failed, the error will return after the reset. A reset is useful for confirming whether the fault is persistent, but it does not substitute for proper diagnosis.