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Error code reference

LG Refrigerator Error Code ICE-Sensor

Ice maker sensor error

LG codesLG refrigerator codes

Ice maker sensor error - ice maker temperature sensor has failed.

First step from the service manual

Disconnect CON10 and measure resistance between pins 1 & 2 (GY to GY); expected 1.4 ~ 120 kΩ.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What ICE-Sensor means on a LG refrigerator

The ICE-Sensor error code on an LG refrigerator indicates that the ice maker temperature sensor has failed or is producing a signal outside the expected operating range. This sensor is a negative temperature coefficient (NTC) thermistor located within the ice maker assembly. Its resistance changes predictably with temperature, and the control board monitors this resistance to regulate ice production cycles. When the board detects a reading outside the acceptable range, it flags the ICE-Sensor fault and may suspend ice maker operation.

Diagnosing this fault begins at connector CON10. With the connector disconnected, measuring resistance between pins 1 and 2 (both GY wire colored) should yield a value between 1.4 kΩ and 120 kΩ depending on the current temperature of the sensor. A reading of zero ohms indicates a short circuit within the sensor or its wiring. An open circuit reading (infinite resistance, OL) confirms the thermistor has failed internally. Either condition will trigger the ICE-Sensor code.

Common root causes include a failed thermistor element inside the ice maker, damaged wiring between the sensor and CON10, or a loose or corroded connector. In some cases, ice buildup around the sensor can cause misleading resistance readings by placing the thermistor in an abnormal thermal environment. If the resistance at CON10 falls within the 1.4 to 120 kΩ range, the sensor itself is likely functional and the fault may originate in the wiring harness or the main control board.

Source: manufacturer service documentation.

Common causes of ICE-Sensor

  1. 01

    Failed ice maker thermistor

    Part replacement

    The NTC thermistor inside the ice maker assembly has failed internally, producing an open circuit or short. This is confirmed by measuring resistance at CON10 pins 1 and 2 and getting a reading outside the 1.4 to 120 kΩ range.

  2. 02

    Damaged or broken sensor wiring

    Part replacement

    The GY wires running from the ice maker sensor to connector CON10 may be pinched, cracked, or broken, interrupting the signal. Inspect the harness along its full length for visible damage or chafing.

  3. 03

    Loose or corroded CON10 connector

    Wiring / connection

    A poor connection at CON10 can cause intermittent or out-of-range resistance readings even when the sensor itself is good. Disconnect, inspect, and reseat the connector to rule this out before replacing parts.

  4. 04

    Excessive ice buildup around the sensor

    Wiring / connection

    Ice accumulation surrounding the thermistor can place the sensor in an abnormal thermal environment, causing readings that fall outside the expected resistance range. Defrosting the ice maker compartment fully before retesting can reveal whether ice buildup was skewing the measurement.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor resistance at CON10 reads correctly within 1.4 to 120 kΩ and the wiring and connector are intact, the control board may be misreading the sensor signal. Board replacement is a last resort after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about ICE-Sensor

What does ICE-Sensor mean on a LG refrigerator?
The ICE-Sensor code means the ice maker temperature sensor (thermistor) has failed or is sending a signal the control board cannot interpret as valid. The refrigerator uses this sensor to monitor ice maker compartment temperature and regulate the ice production cycle. When the sensor reading falls outside the acceptable resistance range, the board logs this fault. Ice maker operation is typically suspended until the issue is resolved.
Will resetting my LG refrigerator clear the ICE-Sensor error?
A reset may temporarily clear the code, but it will return if the underlying sensor fault is still present. The control board continuously monitors the thermistor resistance, so any persistent open circuit, short, or out-of-range reading will trigger the error again. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.
Is the ICE-Sensor error on my LG refrigerator a safety concern?
The ICE-Sensor error is not a safety hazard to your household. It is a functional fault that affects ice production only. Your refrigerator and freezer compartments will continue cooling normally. The main concern is that the ice maker will stop producing ice until the sensor issue is corrected.
How do I fix the ICE-Sensor error on a LG refrigerator?
Start by disconnecting connector CON10 and measuring resistance between pins 1 and 2 using a multimeter. A correct reading falls between 1.4 kΩ and 120 kΩ. If the reading is open or shorted, the thermistor or its wiring needs replacement. If the reading is within range, inspect the wiring harness and CON10 connector for damage or corrosion before suspecting the main control board.
How much does it cost to repair the ICE-Sensor error on a LG refrigerator?
Repair cost depends on the failed component. An ice maker thermistor sensor part typically costs in the range of $15 to $60 for the part alone. If professional labor is required, total repair costs including diagnosis and installation generally range from $100 to $250 depending on your location and service provider. Control board replacement, if needed, will cost more.

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