LG Refrigerator Error Code E rS

E rS indicates a fault with refrigerator temperature sensor 1, the thermistor that monitors the fresh food compartment temperature. The main PCB has detected a short, open circuit, or resistance reading that falls outside the acceptable range. This can be caused by a loose connector, damaged wiring, or a failed sensor. The refrigerator may not cool properly until the fault is resolved.

It is not recommended to rely on the refrigerator while the E rS code is active. Without a functioning temperature sensor, the control board cannot accurately regulate cooling in the fresh food compartment, which could allow food to spoil. Check the actual compartment temperature with a separate thermometer and transfer perishables if the temperature is above 40 degrees Fahrenheit.

A reset by unplugging the refrigerator for a few minutes may temporarily clear the code, but it will return if the underlying fault is still present. The error reflects an active electrical problem with the sensor circuit, so a reset alone is not a repair. The root cause, whether a loose connector, faulty wiring, or a failed thermistor, must be diagnosed and corrected for the code to stay cleared.

Yes, in many cases. Start by unplugging the refrigerator and checking the wiring connector at CON7 pins 19-20 on the main PCB for loose or corroded connections, then reseat it firmly. If the connector looks fine, use a multimeter to test the resistance of the temperature sensor itself. Replacing the thermistor is a straightforward repair that most technicians and experienced DIYers can complete without specialized tools.

If the fix is simply reseating a loose connector, there is no parts cost. Replacing the refrigerator temperature sensor typically costs between $15 and $50 for the part. If the main PCB is at fault, the board itself can range from $100 to $300 or more depending on the model, plus labor if you hire a technician.