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Error code reference

LG Refrigerator Error Code E SS

Short or disconnection of the sensor about ice maker (icing sensor, ice maker sensor).

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Short or disconnection of the sensor about ice maker (icing sensor, ice maker sensor).

First step from the service manual

Check each sensor at 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 SS means on a LG refrigerator

The E SS error code on an LG refrigerator indicates a fault detected in the ice maker sensor circuit, specifically a short circuit or an open circuit (disconnection) in either the icing sensor or the ice maker sensor. These sensors are thermistor-based components that monitor temperature conditions within the ice maker assembly. The refrigerator's control board continuously reads resistance values from these sensors to determine ice production status and freezing cycles. When the board detects a resistance value outside the expected range, either too low (indicating a short) or infinitely high (indicating an open/disconnected circuit), it triggers the E SS code and may halt ice maker operation to prevent damage.

The icing sensor monitors frost or ice buildup conditions, while the ice maker sensor tracks the temperature of the ice tray or mold during the freeze and harvest cycle. A short circuit typically occurs when damaged wiring allows two conductors to contact each other or contact ground, pulling the resistance reading below the acceptable threshold. An open circuit usually results from a broken wire, a corroded or loose connector pin, or a failed thermistor element where internal resistance becomes infinite.

The first diagnostic step is to inspect each sensor at its connector. This means physically locating the sensor connectors on the ice maker harness, checking for bent or pushed-back pins, corrosion, moisture intrusion, or visible wire damage. If the connectors appear intact, resistance testing across the sensor terminals with a multimeter will confirm whether the thermistor itself has failed or whether the fault lies in the wiring harness between the sensor and the control board.

Source: manufacturer service documentation.

Common causes of E SS

  1. 01

    Loose or disconnected sensor connector

    Wiring / connection

    The sensor connector on the ice maker wiring harness may have worked loose over time due to vibration or handling. Inspect each connector for secure seating and check for bent or retracted pins.

  2. 02

    Failed ice maker thermistor

    Part replacement

    The thermistor element inside the icing sensor or ice maker sensor can fail internally, causing an open or short circuit. A multimeter resistance check across the sensor terminals will reveal an out-of-range or infinite reading if the thermistor has failed.

  3. 03

    Damaged wiring harness

    Part replacement

    Wires in the ice maker harness can become pinched, chafed, or cracked, especially in areas exposed to freezing temperatures. Inspect the harness along its full length for visible breaks, bare conductors, or insulation damage.

  4. 04

    Corrosion or moisture at connector pins

    Wiring / connection

    Condensation inside the freezer compartment can cause corrosion on sensor connector pins, increasing resistance or creating intermittent open circuits. Look for greenish or white deposits on the pins and clean or replace the connector as needed.

  5. 05

    Faulty main control board

    Part replacement

    If the sensors and wiring harness test within normal resistance values, the control board's sensor input circuit may have failed. This is the least likely cause and should only be considered after all sensors and wiring are confirmed good.

See the test procedure for each cause

Frequently asked questions about E SS

What does E SS mean on a LG refrigerator?
E SS on an LG refrigerator indicates a short circuit or disconnection in the ice maker sensor circuit, which includes the icing sensor and the ice maker sensor. These are thermistor-based sensors that monitor temperature inside the ice maker assembly. The control board has detected a resistance value outside the acceptable range, signaling either a wiring fault or a failed sensor component. Ice maker operation may be suspended until the fault is corrected.
How do I fix the E SS error code on my LG refrigerator?
Start by locating the ice maker sensor connectors and checking that each one is firmly seated with no bent or corroded pins. If the connectors look good, use a multimeter to test the resistance across each thermistor sensor to determine if the sensor itself has failed. Replace any sensor that reads open or shorted, and repair or replace damaged wiring in the harness. If sensors and wiring both test normal, the main control board may need evaluation.
Will resetting my LG refrigerator clear the E SS code?
A reset may temporarily clear the E SS code, but it will return if the underlying sensor fault is still present. To permanently clear the code, the actual cause, whether a failed thermistor, a bad connector, or damaged wiring, must be diagnosed and repaired. Resetting without fixing the root cause does not restore normal ice maker operation.
Is it safe to keep using my LG refrigerator when E SS is displayed?
The refrigerator's cooling function for food storage is generally not affected by the E SS code, which is specific to the ice maker sensor circuit. However, the ice maker may stop producing ice or operate abnormally while the fault is present. It is advisable to address the issue promptly to avoid extended downtime of the ice maker and to prevent any secondary issues from unmonitored conditions in the ice maker compartment.
How much does it cost to repair the E SS error on an LG refrigerator?
If only a connector needs reseating or cleaning, there may be no parts cost at all. Replacing an ice maker thermistor sensor typically costs between $15 and $60 for the part, depending on the specific model. If a wiring harness replacement is needed, parts and labor together can range from $80 to $200 or more. A main control board replacement, if required, generally falls in the $150 to $350 range for parts alone.

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