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Error code reference

LG Refrigerator Error Code HS E

Humidity sensor error caused by short or disconnection of the freezer humidity sensor.

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Humidity sensor error caused by short or disconnection of the freezer humidity 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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What HS E means on a LG refrigerator

The HS E error code on an LG refrigerator indicates a humidity sensor fault specifically tied to the freezer compartment humidity sensor. This sensor monitors moisture levels inside the freezer and communicates that data to the control board to help regulate defrost cycles and airflow. When the control board detects a reading outside the expected range, typically caused by a short circuit or an open circuit (disconnection) in the sensor circuit, it triggers the HS E fault and logs the error.

The freezer humidity sensor is a resistive-type sensor, meaning the control board interprets humidity levels based on changes in electrical resistance across the sensor circuit. A short circuit will cause resistance to drop abnormally low, while a disconnection or broken wire will send an open circuit signal with effectively infinite resistance. Both conditions fall outside the normal operating range and are read by the control board as a sensor failure.

Common physical causes include corroded or loose connector pins at the sensor harness, damaged wiring in the sensor circuit, or a failed humidity sensor element itself. The first diagnostic step is to inspect the sensor at its connector, checking for proper seating, corrosion, bent pins, or visible wire damage. If the connector appears intact, resistance testing across the sensor terminals can help confirm whether the sensor element 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 HS E

  1. 01

    Loose or disconnected sensor connector

    Wiring / connection

    The humidity sensor connector may have worked loose from vibration or handling during a previous service. Inspecting the connector at the sensor and reseating it firmly is the first step in diagnosis.

  2. 02

    Corroded connector pins

    Wiring / connection

    Moisture inside the freezer compartment can corrode the metal pins inside the sensor connector over time, increasing resistance or breaking the circuit entirely. Look for green or white oxidation on the pins.

  3. 03

    Damaged wiring harness

    Part replacement

    The wiring between the humidity sensor and the control board can become pinched, frayed, or broken, particularly near door hinges or harness routing clips. A visual inspection and continuity test of the wiring will confirm this fault.

  4. 04

    Failed humidity sensor

    Part replacement

    The sensor element itself can fail due to age, moisture intrusion, or thermal stress, resulting in either a short or an open circuit reading at the control board. If resistance testing shows values outside the normal range with the wiring intact, the sensor requires replacement.

  5. 05

    Faulty main control board

    Part replacement

    In rare cases, the control board circuit responsible for reading the humidity sensor signal may fail, causing a false HS E code even when the sensor and wiring are functional. This should only be considered after the sensor and harness have been confirmed good.

See the test procedure for each cause

Frequently asked questions about HS E

What does HS E mean on a LG refrigerator?
HS E on an LG refrigerator indicates a humidity sensor error related to the freezer compartment humidity sensor. The control board has detected either a short circuit or a disconnection in the sensor circuit, placing the reading outside acceptable parameters. The error is meant to alert you that the sensor is not communicating properly with the control board.
Can I fix the HS E error myself?
Some causes of the HS E error are DIY-friendly, such as reseating a loose connector or cleaning corroded pins. However, testing sensor resistance, tracing a wiring fault, or replacing the sensor element or control board typically requires a multimeter and comfort working with refrigerator electrical components. If you are not experienced with appliance electrical diagnostics, a qualified technician is recommended.
Is it safe to keep using my refrigerator while HS E is displayed?
A humidity sensor fault does not immediately create a safety hazard, but it can affect how well the freezer manages moisture and defrost cycles over time. Food safety depends on the freezer maintaining proper temperature, so it is worth monitoring temperatures closely and addressing the fault promptly rather than leaving it unresolved for an extended period.
Will resetting the refrigerator clear the HS E error code?
A power reset may temporarily clear the HS E code from the display, but the error will return if the underlying sensor or wiring fault is still present. The control board will re-detect the out-of-range condition and re-trigger the fault. A reset is useful for confirming whether the error is intermittent, but it does not substitute for proper diagnosis and repair.
How much does it cost to repair an HS E error on an LG refrigerator?
Repair costs vary depending on the root cause. If the fix is simply reseating a connector, there may be no parts cost and only a service call fee, typically in the range of $75 to $150. Replacing the humidity sensor itself generally costs between $20 and $80 for the part, plus labor. If the main control board is at fault, total repair costs can range from $200 to $500 or more depending on the model and labor rates in your area.

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