LG Refrigerator Error IS

⚡ Quick Answer: The LG refrigerator IS error indicates a fault with the ice maker's internal temperature sensor. This issue often results in irregular or halted ice p... ⚠️ Difficulty Varies

What Does Error IS Mean?

The LG refrigerator IS error indicates a fault with the ice maker's internal temperature sensor. This issue often results in irregular or halted ice production and may cause unusual noises from the ice compartment. While this error does not affect the main cooling functions of the refrigerator and freezer, addressing the temperature sensor issue is crucial for restoring normal ice-making operations.

Common Symptoms:

  • Code displayed prominently on the control panel when ice maker isn’t functioning normally
  • Ice production stops or is irregular
  • Ice maker may not dispense ice while code persists
  • No direct impact on main cooling (fridge/freezer) beyond ice making failure

Possible Causes

  • Ice maker temperature sensor fault or disconnection (high)

How to Fix Error IS

DIY Fix Perform basic checks and reset

  1. Ensure the ice maker is enabled in settings (toggle if applicable).
  2. Check the ice maker compartment for obvious ice jams or blockages.
  3. Unplug the refrigerator from power for 5–10 minutes to reset the control board.
  4. Plug the refrigerator back in and monitor if the ‘IS’ code clears.

Technician Only Diagnose and replace ice maker sensor if faulty

  1. Access the ice maker assembly following model‑specific guidelines.
  2. Measure the resistance of the ice maker temperature sensor and compare with expected values for the ambient temperature.
  3. Inspect wiring harnesses and connectors for damage or disconnection.
  4. If the sensor is out of specification or damaged, replace the ice maker temperature sensor or the entire ice maker assembly.
  5. Verify operation and that the ‘IS’ code does not reappear.

Parts needed: Ice maker temperature sensor, Ice maker assembly harness/connectors

🛑 When to Call a Pro:
  • If the error code persists after reset and basic checks
  • If there is visible damage to wiring or components inside the ice maker
  • If replacement parts are required but you are not experienced with refrigerator repairs

Next step

Choose the next step for IS

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Ice Maker Assembly

Automatically freezes and dispenses ice cubes inside the freezer compartment.

$75 - $160 · Medium · 20-30 mins

Check fit & price
Model number required

Model-compatible Refrigerator parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Refrigerator Condenser Coil Brush

For routine cleaning of accessible condenser areas where the manufacturer permits it. It does not repair a sealed-system or compressor fault.

View maintenance supply
Maintenance supply

Model-Compatible Refrigerator Water Filter

A routine replacement item on models with a water filter. Match the complete appliance model and existing filter number before ordering.

Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.

Find one that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

wattage 100W
component Ice Maker Assembly
resistance 10-20 ohms
part_number AJU73213301
voltage_rating 120V AC

Common Questions

What does IS error mean on LG refrigerator?

The IS error indicates a problem with the ice maker's temperature sensor, affecting ice production.

Can I fix LG refrigerator IS error myself?

Yes, you can perform basic checks and reset the ice maker; however, complicated issues may require professional help.

How much does it cost to fix IS error?

Repair costs range from ¥5,000 to ¥20,000+ for the sensor or assembly part, excluding labor.

When should I call a technician for IS?

If the error persists after resetting, or if there are visible damages, it's best to call a technician.

Sources & References

Data last verified: 2026-07-26

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