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Error code reference

LG Refrigerator Error Code E-gS

Room temperature sensor malfunction

LG codesLG refrigerator codes

Room temperature sensor malfunction - open or short-circuited wire.

First step from the service manual

Inspect connecting wires on each sensor. Use LED CHECK mode.

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

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What E-gS means on a LG refrigerator

The E-gS error code on an LG refrigerator indicates a malfunction in the room temperature sensor, also called the ambient temperature sensor. This sensor monitors the surrounding environmental temperature and provides data to the control board so the refrigerator can adjust its cooling cycles accordingly. When the control board detects either an open circuit (broken or disconnected wire) or a short circuit (wiring contact causing unintended conductivity) in the sensor loop, it triggers the E-gS code and may alter or suspend normal operation.

The room temperature sensor itself is a thermistor, a resistive component whose resistance value changes predictably with temperature. If the wiring harness connecting the sensor to the control board is damaged, pinched, corroded, or has a failed connector, the board receives an out-of-range resistance reading, which it interprets as either an open or short fault. Physical damage to the sensor element itself can produce the same result if the thermistor has drifted beyond its normal operating resistance range.

Diagnosis begins with a visual inspection of all connecting wires on the room temperature sensor, checking for pinched insulation, corrosion at connector terminals, or broken wire strands. LG's LED CHECK mode should be used to confirm active fault status and isolate the sensor circuit before replacing components. If the wiring and connectors are intact, the sensor thermistor should be tested with a multimeter to confirm whether its resistance is within the expected range for the current ambient temperature.

Source: manufacturer service documentation.

Common causes of E-gS

  1. 01

    Damaged or broken wiring harness

    Part replacement

    The wires connecting the room temperature sensor to the control board may be pinched, cut, or broken, creating an open circuit. Inspect the full length of the harness for visible damage, especially near routing clips or sharp edges.

  2. 02

    Corroded or loose connector terminals

    Wiring / connection

    Moisture or age can corrode the connector pins between the sensor harness and the control board, causing intermittent or complete loss of continuity. Check both ends of the connector for oxidation, bent pins, or a loose fit.

  3. 03

    Failed room temperature thermistor

    Part replacement

    The thermistor sensor element itself may have failed internally, producing a resistance value outside the expected range that the control board reads as an open or short fault. Testing with a multimeter will confirm if the sensor needs replacement.

  4. 04

    Short circuit in sensor wiring

    Part replacement

    Two wires in the sensor circuit may be contacting each other due to damaged insulation, causing a short that the board detects as an abnormal resistance reading. This is often found where harness wires are routed close together or through tight spaces.

See the test procedure for each cause

Frequently asked questions about E-gS

What does E-gS mean on a LG refrigerator?
The E-gS code means the room temperature sensor has a detected fault, specifically an open or short circuit in its wiring. This sensor monitors the ambient temperature around the refrigerator and sends that data to the control board. When the board cannot get a valid reading from the sensor circuit, it triggers this code. The first diagnostic step is to inspect the sensor wiring and use LED CHECK mode to confirm the fault.
Can I fix the E-gS error myself?
In some cases, yes. If the issue is a loose connector or visually damaged wire, a knowledgeable DIYer can inspect and reseat connectors or repair wiring. If the thermistor itself has failed, replacing the room temperature sensor is a moderately accessible repair. However, using LG's LED CHECK mode to confirm the fault before purchasing parts is strongly recommended.
Is it safe to keep using my LG refrigerator while the E-gS code is active?
The refrigerator may continue to run with this code active, but its ability to regulate cooling based on ambient temperature will be compromised. Food safety could be affected if cooling performance degrades significantly. It is best to address the fault promptly rather than operating the unit for an extended period with a faulty sensor.
Will resetting the refrigerator clear the E-gS error code?
A reset may temporarily clear the code from the display, but if the underlying wiring or sensor fault is still present, the code will return once the control board runs its diagnostic checks again. A permanent fix requires repairing or replacing the faulty wiring, connector, or sensor thermistor.
How much does it cost to repair an E-gS error on an LG refrigerator?
If only a wire repair or connector cleaning is needed, costs can be minimal, generally in the range of a few dollars for supplies. If the room temperature sensor thermistor requires replacement, parts typically range from around $15 to $50 depending on the model. Adding professional labor, the total repair cost usually falls somewhere between $100 and $250.

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