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Error code reference

LG Freezer Error Code E2

Failure of right compartment sensor (sensor wire is cut or short-circuited).

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Failure of right compartment sensor (sensor wire is cut or short-circuited).

First step from the service manual

Measure resistance at both ends of CON3 pins 1 and 2 after disconnecting from PCB; normal range is 0.5 Vdc to 4.5 Vdc at the sensor voltage checkpoint; open reads 5 Vdc, shorted reads 0 Vdc.

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

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What E2 means on a LG freezer

The E2 error code on an LG freezer indicates a failure in the right compartment temperature sensor circuit. This sensor is a thermistor, a resistive component whose resistance changes predictably with temperature. The freezer's main PCB monitors the voltage signal produced by this thermistor through a voltage divider circuit. Under normal operation, the sensor produces a voltage reading between 0.5 Vdc and 4.5 Vdc at the designated checkpoint. When the PCB receives a signal outside this range, it logs the E2 fault and alerts the user.

The fault is triggered by one of two electrical failure modes: an open circuit or a short circuit in the sensor wiring or the sensor itself. An open circuit, caused by a broken wire or a failed thermistor, drives the signal voltage up to approximately 5 Vdc because no current path exists to pull the voltage down. A short circuit, caused by chafed wire insulation or a thermistor shorted to ground, collapses the voltage to approximately 0 Vdc. Both readings fall outside the acceptable 0.5 to 4.5 Vdc window and trigger the E2 code.

Diagnosis begins at connector CON3 on the PCB. After disconnecting the connector, measure resistance across pins 1 and 2 to evaluate the sensor and its wiring in isolation from the board. A reading near 5 Vdc at the checkpoint points to an open circuit in the sensor loop, while a reading near 0 Vdc confirms a short. Identifying which failure mode is present will determine whether the fault lies in the wiring harness, the connector itself, or the thermistor component.

Source: manufacturer service documentation.

Common causes of E2

  1. 01

    Failed right compartment thermistor

    Part replacement

    The thermistor itself has failed internally, producing either an open or short circuit. This is the most common root cause and is confirmed when the wiring harness checks out intact but the sensor still reads 0 Vdc or 5 Vdc at the CON3 checkpoint.

  2. 02

    Broken or cut sensor wire

    Part replacement

    Physical damage to the sensor wiring harness creates an open circuit, driving the signal to approximately 5 Vdc. Inspect the wire run from the sensor to CON3 pins 1 and 2 for any cuts, pinch points, or breaks.

  3. 03

    Chafed or shorted wiring insulation

    Wiring / connection

    Wire insulation worn through by contact with a sharp cabinet edge or freezer component can cause a short to ground, collapsing the signal to approximately 0 Vdc. Look for bare copper visible along the harness routing path.

  4. 04

    Loose or corroded CON3 connector

    Wiring / connection

    A loose or corroded connection at CON3 pins 1 or 2 on the PCB can intermittently break the circuit, triggering the E2 code. Disconnect and reseat the connector, inspecting the terminals for oxidation or bent pins.

  5. 05

    Faulty main PCB

    Part replacement

    If the sensor and full wiring harness test within normal parameters but the E2 fault persists, the PCB itself may have a damaged input circuit for the right compartment sensor. This is the least likely cause and should only be considered after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about E2

What does E2 mean on a LG freezer?
The E2 code means the right compartment temperature sensor has a wiring fault, either an open circuit or a short circuit. The PCB monitors the sensor's voltage output, and a normal reading falls between 0.5 Vdc and 4.5 Vdc. A reading near 5 Vdc indicates a broken or open circuit, while a reading near 0 Vdc indicates a short. The freezer displays E2 when the signal falls outside that acceptable range.
Can I fix the E2 error myself on my LG freezer?
A knowledgeable DIYer can diagnose this fault by disconnecting connector CON3 from the PCB and measuring voltage across pins 1 and 2 to locate the problem. If the issue is a loose connector or a visible wire repair, this may be a straightforward fix. Replacing the thermistor sensor is also a moderate DIY task, but if the PCB is at fault, professional repair is recommended.
Is it safe to keep using my LG freezer while the E2 code is active?
Continuing to run the freezer with an active E2 code is not advisable. Without a functioning right compartment sensor, the PCB cannot accurately regulate temperature in that section, which means food stored there may not be kept at a safe temperature. The compressor may also operate outside its intended parameters without proper sensor feedback.
How much does it cost to repair an E2 error on an LG freezer?
Repair costs vary depending on the failed component. A replacement thermistor sensor typically costs between 15 and 50 dollars for the part alone. If professional labor is needed, total costs including diagnosis and labor generally range from 100 to 250 dollars. A PCB replacement, if required, will push the total cost significantly higher.
Will resetting my LG freezer clear the E2 error code?
A power reset may temporarily clear the E2 code from the display, but the code will return if the underlying wiring or sensor fault has not been corrected. The PCB continuously monitors the sensor voltage, so any persistent open circuit or short circuit will trigger the fault again shortly after the unit restarts. The sensor circuit must be repaired or the component replaced to permanently resolve the error.

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