LG Refrigerator Error Code Er (rS note2)

Er (rS note2) means that LG refrigerator sensor 2 has been detected as having an open circuit (snapped) or a short circuit. This sensor monitors temperature in the fresh food compartment. The code only appears during the LED diagnostic check mode, accessed by pressing and holding the Freezing and Express Freezing buttons for more than 1 second. A technician should measure the sensor's resistance to confirm whether the sensor or its wiring is at fault.

Because this error indicates the control board cannot accurately read the fresh food compartment temperature, the refrigerator may not maintain safe food storage temperatures consistently. It is advisable to check food temperatures with a separate thermometer and limit how long perishables are stored until the sensor fault is repaired.

Repair costs vary depending on whether the issue is a faulty sensor, damaged wiring, or a control board problem. A replacement refrigerator thermistor sensor typically costs between $15 and $60 for the part. Adding professional labor, the total repair cost generally ranges from $100 to $250, though a control board replacement would increase costs significantly.

Start by entering the LED diagnostic mode using the Freezing and Express Freezing buttons held for more than 1 second, then check the resistance of refrigerator sensor 2. Inspect the wiring harness and connector for damage or corrosion. If the sensor reads open or shorted, the thermistor will need to be replaced. If wiring or connectors are damaged, repair or replace those first before condemning the sensor.

A power reset may temporarily clear the error from the display, but the underlying sensor fault will remain. If the thermistor is physically broken or shorted, the error will return once the control board performs its next diagnostic cycle. A proper repair requires testing and replacing the faulty sensor or wiring.