Display shows Er rS; refrigerator sensor error that may cause overall cooling imbalance.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the refrigerator compartment panels.
Er rS indicates a problem with the fresh food temperature sensor.
- Locate sensor: Find the thermistor housing on the refrigerator wall.
- Inspect and reseat: Check for damage and reseat the connector.
- Test sensor: Measure resistance and compare to LG spec. Replace if out of range.
Persistent Er rS after sensor replacement suggests a main PCB fault requiring professional service.
Repair Difficulty
Required Part
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