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Error code reference

LG Refrigerator Error Code Icemaking Sensor malfunction

Icemaker sensor has an open or short-circuited wire.

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Icemaker sensor has an open or short-circuited wire.

First step from the service manual

Make sure that the wire on each sensor is connected.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What Icemaking Sensor malfunction means on a LG refrigerator

The Icemaking Sensor malfunction error on an LG refrigerator indicates that the control board has detected either an open circuit or a short circuit in the wiring associated with the icemaker temperature sensor. This sensor monitors the temperature within the icemaker assembly to regulate the ice production cycle, including harvest timing and freeze cycles. When the circuit is interrupted or shorted, the control board cannot receive accurate temperature data and triggers this fault code to prevent incorrect operation.

The most common root causes involve wiring integrity rather than sensor failure itself. Connectors that have loosened over time, wire harnesses that have been pinched or damaged by ice buildup, or terminals that have corroded can all produce an open or shorted circuit. Because the icemaker is located in a cold, humid environment, connector corrosion and harness brittleness are particularly frequent contributors to this type of fault.

Diagnosing this error begins with a careful inspection of every connector in the icemaker sensor circuit to confirm each is fully seated and free of corrosion or damage. If the connectors are secure and undamaged, the sensor itself should be tested for proper resistance values using a multimeter, and the wire harness should be inspected along its full length for any pinching, cuts, or breaks. Replacement of the sensor or harness segment is necessary if a fault is confirmed in either component.

Source: manufacturer service documentation.

Common causes of Icemaking Sensor malfunction

  1. 01

    Loose or disconnected sensor connector

    Wiring / connection

    The sensor wire connector to the icemaker assembly may have vibrated loose or been dislodged during routine use. Visually inspect and firmly reseat each connector in the icemaker sensor circuit as the first diagnostic step.

  2. 02

    Corroded or damaged connector terminals

    Part replacement

    Exposure to the cold, humid environment inside the freezer can cause terminal pins to corrode, creating high resistance or an open circuit. Inspect connector terminals closely for green or white oxidation and replace the connector or harness if corrosion is present.

  3. 03

    Pinched or broken wire harness

    Part replacement

    The sensor wire harness can become pinched by ice buildup, the icemaker assembly itself, or other components during reinstallation. Trace the full length of the harness looking for visible damage, kinking, or cuts that would cause an open circuit.

  4. 04

    Failed icemaker temperature sensor

    Part replacement

    The sensor itself may have failed internally, presenting as an open or short circuit even when wiring is intact. Test the sensor with a multimeter to check for the correct resistance reading and replace it if the reading is out of range or shows no continuity.

  5. 05

    Ice or frost accumulation interfering with wiring

    Wiring / connection

    Excessive frost buildup around the icemaker can encase and stress wire connections, eventually causing an open circuit. Defrosting the icemaker compartment fully before inspecting the wiring can reveal or resolve this issue.

See the test procedure for each cause

Frequently asked questions about Icemaking Sensor malfunction

What does Icemaking Sensor malfunction mean on a LG refrigerator?
This error means the refrigerator's control board has detected an open or short-circuited wire in the icemaker sensor circuit. The icemaker temperature sensor is responsible for monitoring conditions in the icemaker assembly to control the freeze and harvest cycle. When the circuit is broken or shorted, the board cannot receive valid temperature data and displays this fault. Ice production will typically stop until the issue is resolved.
Can I fix the Icemaking Sensor malfunction error myself?
A knowledgeable DIYer can attempt the initial diagnostic steps, which involve checking that every sensor wire connector is fully seated and free of visible damage or corrosion. If reconnecting a loose connector clears the error, no further repair is needed. However, if the wire harness is damaged or the sensor itself has failed, replacing those components requires some comfort with appliance disassembly and use of a multimeter to test resistance.
Is the Icemaking Sensor malfunction error dangerous or a safety concern?
This error is not a safety hazard to people or the refrigerator's food storage compartment. It is isolated to the icemaker circuit and will typically cause ice production to stop rather than creating any risk of overheating or electrical danger. Food stored in the main refrigerator and freezer sections should remain unaffected as long as the main cooling system is operating normally.
How much does it cost to repair the Icemaking Sensor malfunction on an LG refrigerator?
If the fix is simply reseating a loose connector, there is no parts cost, though a service call fee may still apply if a technician is involved. Replacement of the icemaker temperature sensor typically costs between $20 and $75 for the part alone. If the wire harness needs replacement, parts can range from $30 to $100 or more depending on the specific model, with additional labor costs if a technician performs the work.
Will resetting the LG refrigerator clear the Icemaking Sensor malfunction error?
A power reset may temporarily clear the error code from the display, but if the underlying open or short circuit in the sensor wiring still exists, the fault will return once the control board runs its diagnostics again. A reset is useful for confirming whether the issue is intermittent or persistent, but it does not repair a damaged wire, corroded terminal, or failed sensor. The physical wiring and sensor must be inspected and repaired to permanently resolve the fault.

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