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Error code reference

LG Refrigerator Error Code 04

Ice Maker function error

LG codesLG refrigerator codes

Ice Maker function error - ice ejector and level failed three times or more.

First step from the service manual

Push the test button on the I/M Assembly and verify it works.

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 04 means on a LG refrigerator

Error code 04 on an LG refrigerator indicates an ice maker function failure, specifically that the ice ejector motor and ice level sensor have both failed to complete their cycles successfully three or more consecutive times. The ice maker assembly relies on a motorized ejector to push formed ice cubes out of the mold and into the storage bin, along with a sensor that detects when the bin is full. When neither of these functions can complete a successful cycle across three or more attempts, the control board logs error 04 and halts ice production to prevent mechanical damage.

The most direct diagnostic starting point is pressing the test button located on the ice maker assembly itself. This test cycle forces the ejector arm through a full rotation and activates the level sensor, allowing you to observe whether the motor runs, whether it stalls or binds, and whether the sensor responds correctly. If the test cycle completes without issue, the problem may be intermittent or related to control board communication rather than a failed mechanical component.

Common root causes include a seized or worn ejector motor, ice bridging or blockage jamming the ejector arm, a faulty ice level sensor that misreads the bin status, and wiring harness faults between the ice maker assembly and the main control board. Frozen water around the ejector mechanism, often caused by a defrost issue or door seal leak, can also cause repeated cycle failures by physically preventing the ejector from turning through its full range of motion.

Source: manufacturer service documentation.

Common causes of 04

  1. 01

    Ice jam or blockage in the ejector mechanism

    Wiring / connection

    Ice can bridge or clump around the ejector arm, physically preventing it from completing its rotation. Inspect the ice maker mold and ejector for visible ice buildup or fused cubes blocking movement.

  2. 02

    Faulty or seized ejector motor

    Part replacement

    The ejector motor drives the arm that pushes ice out of the mold. If the motor windings are burnt out or the gear mechanism is seized, the arm will stall mid-cycle and trigger repeated failures.

  3. 03

    Failed ice level sensor

    Part replacement

    The ice level sensor detects when the storage bin is full and signals the ice maker to pause production. A defective sensor may incorrectly report a full or error state on every cycle, causing repeated failed attempts.

  4. 04

    Wiring harness fault between ice maker and control board

    Wiring / connection

    Damaged, corroded, or loose connectors in the wiring harness can interrupt signals between the ice maker assembly and the main control board. Check the connector at the ice maker assembly for corrosion, bent pins, or loose seating.

  5. 05

    Frost or ice buildup from defrost system failure

    Part replacement

    A failing defrost heater or thermistor can allow frost to accumulate around the ice maker, freezing the ejector arm in place. If excessive frost is visible in the freezer compartment, the defrost system should be tested before replacing ice maker components.

See the test procedure for each cause

Frequently asked questions about 04

What does 04 mean on a LG refrigerator?
Error code 04 on an LG refrigerator means the ice maker has experienced a function failure in which both the ice ejector and the ice level sensor failed to complete their cycles three or more times in a row. The refrigerator logs this code and stops ice production to prevent mechanical damage. The first step is to press the test button on the ice maker assembly to see if the unit can complete a manual test cycle.
Can I fix LG error code 04 myself?
In some cases, yes. If the cause is an ice jam or blockage, you can power off the refrigerator, allow the ice maker to thaw, clear the obstruction, and restart. If the ejector motor or ice level sensor has failed, those components will need to be replaced, which is a moderate-difficulty repair that requires disconnecting the ice maker assembly and installing a new part.
Is it safe to use my LG refrigerator while error code 04 is displayed?
The refrigerator's cooling and food storage functions are not directly affected by error code 04. The error is isolated to the ice maker system, so your fresh food and freezer compartments should continue operating normally. However, you should not expect ice production to resume until the fault is diagnosed and corrected.
Will resetting my LG refrigerator clear error code 04?
A power reset may temporarily clear the error code, but it will return if the underlying cause is not fixed. Since error 04 requires three or more consecutive failures before it triggers, the ice maker will attempt its cycles again after a reset and re-display the code if the ejector or sensor is still faulty. Resolving the root cause is necessary for a lasting fix.
How much does it cost to repair LG error code 04?
Repair costs depend on the failed component. If the fix requires only clearing an ice jam, there is no parts cost involved. Replacing the ice maker assembly or ejector motor typically runs between $80 and $200 for parts alone, while a full service call including labor can range from $150 to $350 or more depending on your location and the specific components that need replacement.

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