LG Refrigerator Error Code IS / 15 — Ice Maker Fan Motor or Sensor Disconnection
What this means
The IS error code on LG refrigerators (sometimes displayed as 15 due to the segment display) indicates a problem with the ice maker fan motor or a disconnection of the ice maker sensor. The ice maker fan circulates cold air around the ice maker tray to speed up freezing. When the fan motor fails or the sensor wire becomes disconnected, ice production slows or stops entirely. This code is common on LG French Door models with top-mount ice makers and on InstaView refrigerators. On Craft Ice models, this error prevents round ice ball production.
Alternate codes: 15, I5
Step-by-step fix
4 stepsPower-reset the refrigerator
Unplug the refrigerator for 5 minutes, then plug it back in. Check if the IS code clears. A temporary fan motor stall caused by frost can sometimes resolve after a defrost period.
If the fan was stalled by frost, you may hear it spin up again after the reset.
Check for frost around the ice maker fan
Open the freezer and locate the ice maker fan (usually behind or beside the ice maker). Look for excessive frost buildup that may be blocking the fan blades. If frost is present, manually defrost the area by leaving the freezer door open for 2–3 hours or by using a hair dryer on low heat.
Excessive frost around the ice maker fan often indicates a defrost cycle problem or a door seal issue allowing humid air in.
Inspect the fan motor and sensor wiring
Remove the ice maker cover panel. Check the fan motor connector and the ice maker sensor wire for loose or disconnected plugs. Reseat all connectors firmly.
Look for any signs of damage or corrosion on the wire terminals, which can indicate moisture intrusion.
Test the fan motor
Using a multimeter, test the ice maker fan motor for continuity. If the motor shows no continuity, it needs replacement. Also try spinning the fan blade by hand — it should turn freely without grinding or resistance.
If the fan turns freely but has no continuity, the motor winding has failed. If it does not turn freely, bearings have seized.
When to call a professional
If the fan motor or sensor requires replacement and you are not comfortable working with the ice maker assembly wiring, a technician can diagnose and replace the correct part.
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 Fan Motor
Part #4681JK1004A · $25–$50
If the fan motor has no continuity or seized bearings
Ice Maker Sensor Assembly
Part #EBG61285804 · $20–$35
If the sensor is disconnected or reads out of spec
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