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Error code reference

LG Refrigerator Error Code E IS

Icing sensor error

LG codesLG refrigerator codes

Icing sensor error - short or disconnection of the sensor about ice maker (icing sensor, ice maker sensor). Displayed without user input indicates icing sensor error.

First step from the service manual

Check each sensor and its connector.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What E IS means on a LG refrigerator

The E IS error code on an LG refrigerator indicates a fault with the icing sensor, also referred to as the ice maker sensor. This sensor monitors temperature conditions within the ice maker assembly to regulate the ice-making cycle. When the control board detects either a short circuit or an open circuit (disconnection) in the icing sensor circuit, it triggers this error code. Critically, if E IS appears without any user input or button press, this is a strong indicator that the icing sensor itself has failed or lost its connection to the control board.

The icing sensor is a thermistor-based component, meaning its resistance value changes in response to temperature. The control board reads this resistance to determine ice maker temperature. A short circuit causes the resistance to drop far below the expected range, while a disconnection or broken wire causes the resistance to read abnormally high or infinite. Either condition prevents the control board from accurately monitoring the ice maker, halting ice production as a protective measure.

Diagnosis begins by inspecting the sensor and its wiring harness connector. Technicians should check for visible damage to the sensor body, corrosion at the connector pins, or breaks in the wiring between the sensor and the control board. The connector should be unplugged and reseated to rule out a loose connection. If the connector is intact, the sensor itself should be tested with a multimeter to confirm whether its resistance falls within the expected range for the ambient temperature. A sensor reading open or shorted should be replaced.

Source: manufacturer service documentation.

Common causes of E IS

  1. 01

    Loose or disconnected sensor connector

    Wiring / connection

    The wiring harness connector linking the icing sensor to the control board may have come loose due to vibration or handling during past repairs. Unplugging and firmly reseating the connector is the first check to perform.

  2. 02

    Failed icing sensor (thermistor)

    Part replacement

    The icing sensor itself may have failed internally, resulting in a short or open circuit that the control board interprets as an error. Testing the sensor with a multimeter will confirm whether its resistance is out of range.

  3. 03

    Damaged or broken wiring

    Part replacement

    The wire harness between the icing sensor and the control board can develop breaks or chafing, particularly near routing points or clips. Inspect the full length of the wiring for cuts, pinches, or burn marks.

  4. 04

    Corroded connector pins

    Wiring / connection

    Moisture inside the refrigerator cabinet can cause corrosion to build up on the sensor connector pins, increasing resistance in the circuit and triggering a disconnection error. Inspect the connector under good lighting for green or white oxidation.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring check out correctly, the control board may be misreading the sensor circuit. This is the least common cause and should only be considered after the sensor and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about E IS

What does E IS mean on a LG refrigerator?
E IS on an LG refrigerator indicates an icing sensor error, meaning the control board has detected either a short circuit or a disconnection in the ice maker temperature sensor circuit. This sensor, also called the ice maker sensor or icing sensor, monitors temperature within the ice maker assembly. When it fails or loses its connection, the refrigerator cannot regulate the ice-making cycle and displays this code. If the error appears on its own without any button press, the icing sensor itself is the most likely cause.
Can I fix the E IS error myself on my LG refrigerator?
Some causes of the E IS error are DIY-friendly. Start by locating the icing sensor connector in the ice maker area and unplugging it, then firmly reseating it to rule out a loose connection. If you are comfortable using a multimeter, you can test the sensor resistance to determine if it has failed. Replacing the icing sensor is a straightforward part swap for most technicians and capable DIYers, though accessing the sensor may require removing the ice maker assembly.
Is it safe to use my LG refrigerator while the E IS error is showing?
The E IS error specifically affects the ice maker system, so the refrigerator and freezer compartments should continue to cool normally. It is generally safe to continue using the appliance for food storage while you diagnose the issue. However, the ice maker will not function properly until the sensor fault is resolved, so expect ice production to be halted or unreliable.
How much does it cost to repair the E IS error on an LG refrigerator?
If the fix is simply reseating a loose connector, there is no parts cost involved. If the icing sensor itself needs to be replaced, the part typically costs in the range of $15 to $50 depending on the specific model. If a professional technician is required, expect to pay $100 to $250 or more for a service call and labor on top of the parts cost.
Will resetting my LG refrigerator clear the E IS error code?
A power reset by unplugging the refrigerator for a few minutes may temporarily clear the E IS code, but the error will return if the underlying sensor fault has not been corrected. The code is triggered by an active electrical fault in the icing sensor circuit, so resetting alone is not a fix. The sensor, connector, and wiring must be inspected and repaired or replaced to permanently resolve the error.

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