LG Refrigerator Error Code Er rS — Refrigerator Sensor Error
What this means
The Er rS error code indicates the fresh food (refrigerator) compartment temperature sensor (thermistor) is sending an abnormal reading. This sensor monitors the refrigerator compartment temperature and tells the control board when to circulate cold air from the freezer. A faulty sensor can cause the fridge to be too warm or too cold.
Alternate codes: rS
Step-by-step fix
3 stepsLocate the refrigerator sensor
The fresh food sensor is typically located inside the refrigerator compartment, often near the top or near the air vent where cold air enters from the freezer. It is a small thermistor with a wire connector.
Test the sensor
Unplug the refrigerator. Disconnect the sensor and test with a multimeter. At 37°F (3°C) — normal fridge temperature — the sensor should read approximately 8,000–9,000 ohms. A reading of 0 or infinity indicates failure.
Compare your reading against an NTC thermistor resistance chart for the specific temperature.
Replace the sensor
If the sensor is faulty, remove it from its mount and install the replacement. Reconnect the wiring and plug the refrigerator back in. The error should clear within a few minutes.
When to call a professional
If the sensor tests fine but the error persists, the control board's sensor input circuit may be faulty. A technician can test the board.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Refrigerator Temperature Sensor
Part #6615JB2005H · $10–$20
If resistance reading is abnormal
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