LG Refrigerator Error Code Er rS (sensor 2)

Er rS indicates that the refrigerator's sensor 2, a temperature-sensing thermistor, has either an open circuit (broken wire) or a short circuit. The control board monitors this sensor to regulate cooling and displays this code when the signal falls outside acceptable parameters. The refrigerator may not cool properly while this error is active.

It is not recommended to rely on the refrigerator for food storage while this error is active. Because sensor 2 is used to monitor compartment temperature, the cooling system may not function correctly, and food could be held at unsafe temperatures. Perishable items should be moved to another refrigerator until the fault is resolved.

If only the temperature sensor needs replacement, parts typically cost in the range of $15 to $50, and the repair is relatively inexpensive if done without professional labor. If the PWB assembly requires replacement, parts alone can range from $100 to $300 or more, with additional labor costs if a technician is needed. Getting a diagnostic assessment first helps avoid unnecessary parts replacement.

A knowledgeable DIYer can perform the first diagnostic step by disconnecting CON8 from the PWB assembly and measuring the sensor resistance with a digital multimeter. If the sensor reads open or shorted, replacing the sensor is a straightforward repair. However, if the wiring or PWB assembly is involved, professional service may be needed.

A power reset may temporarily clear the error code, but if the underlying sensor failure is still present, the code will return once the control board re-checks the sensor circuit. A permanent fix requires diagnosing and repairing or replacing the faulty sensor, wiring, or connector at CON8.