LG Refrigerator Error Code IS: How to Fix It

Medium 30-45 minutes High Severity Verified June 2026
Error Code
IS
Brand
LG
Product Type
refrigerator
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
30-45 minutes
The LG refrigerator error code IS (also displayed as 1S) indicates a problem with the ice maker's fan motor or a disconnected sensor. This error typically means the ice maker fan isn't working properly or there's a communication issue between the ice maker components and the main control board.
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Tools You'll Need

How to Fix Error Code IS

  1. Unplug the refrigerator

    Always disconnect power before performing any maintenance to avoid electrical shock.
  2. Check ice maker power switch

  3. Inspect ice maker fan

    Use caution when reaching into the ice maker compartment to avoid cuts from sharp ice or metal edges.
  4. Check wiring connections

    Handle wiring carefully and ensure power remains disconnected while checking connections.
  5. Test ice maker fan motor

  6. Reset the ice maker

  7. Check freezer temperature

Parts You May Need

Ice maker fan motor
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Wire harness connectors
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Ice maker temperature sensor
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Ice maker fan motor
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Wire harness connectors
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Ice maker temperature sensor
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Ice maker fan motor
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Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
Ice maker fan motor
Check Price on Amazon
Wire harness connectors
Check Price on Amazon
Ice maker temperature sensor
Check Price on Amazon
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When to Call a Professional

Call a professional if the ice maker fan motor is faulty and needs replacement, if there are extensive wiring issues, or if the error persists after following all troubleshooting steps. Fan motor replacement requires disassembly of the ice maker unit and should be done by a qualified technician.

Frequently Asked Questions

What does error code IS mean on my LG refrigerator?
Error code IS (or 1S) on an LG refrigerator indicates a problem with the ice maker fan motor or a sensor disconnection. This prevents the ice maker from operating properly and requires troubleshooting to restore ice production.
Can I still use my LG refrigerator with error code IS?
Yes, you can continue using your LG refrigerator for food storage when error code IS appears. Only the ice maker function will be affected. The refrigerator and freezer compartments will continue to maintain proper temperatures.
How do I reset my LG refrigerator ice maker?
To reset your LG refrigerator ice maker, unplug the refrigerator for 5 minutes, then plug it back in. Alternatively, press and hold the ice maker reset button (located inside the ice maker) for 5-10 seconds. Wait 24 hours to see if normal operation resumes.
Why is my LG ice maker fan not working?
The LG ice maker fan may not work due to ice buildup blocking the blades, a faulty fan motor, loose wiring connections, or a malfunctioning control board. Check for physical obstructions first, then inspect electrical connections.
How much does it cost to fix LG refrigerator error code IS?
Repair costs for LG refrigerator error code IS vary depending on the cause. Simple fixes like cleaning or resetting cost nothing. If the ice maker fan motor needs replacement, expect to pay $150-$300 for parts and professional installation.