LG Refrigerator Error Code Er IS — Ice Maker Sensor Error
What this means
The Er IS error code indicates a problem with the ice maker's sensor system. This sensor monitors ice maker operation, including ice tray position and ice level. When it fails, the ice maker may not produce ice, may overproduce, or may cycle incorrectly. A faulty sensor, a jammed ice maker mechanism, or a wiring issue can cause this error.
Alternate codes: IS
Step-by-step fix
4 stepsReset the ice maker
Locate the ice maker's test/reset button (usually a small button on the side or bottom of the ice maker unit). Press and hold it for 3–5 seconds until you hear a chime. The ice maker will run a test cycle.
On some LG models, the test button is behind the ice maker cover — you may need to remove the ice bucket to access it.
Check for ice jams
Remove the ice bucket and inspect the ice maker for clumped or stuck ice that may be preventing the mechanism from rotating. Clear any jammed ice and reinstall the bucket.
Ice clumping is common during power outages — ice melts partially and refreezes in a solid mass.
Inspect the ice maker wiring
Unplug the refrigerator. Remove the ice maker (usually held by 2–3 screws). Check the wire harness connector on the back of the ice maker for corrosion, damage, or loose connections.
Frost can accumulate on the connector and cause intermittent connection issues.
Replace the ice maker assembly
If the sensor is integrated into the ice maker (as it is on most LG models), the entire ice maker assembly needs to be replaced. Mount the new unit, reconnect the wiring, and run a test cycle.
When to call a professional
If the ice maker assembly replacement doesn't resolve the error, the control board's ice maker circuit may be at fault. A technician can diagnose 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
Ice Maker Assembly
Part #AEQ73110212 · $80–$150
If ice maker sensor is integrated and faulty
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