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Error code reference

LG Refrigerator Error Code Er (Ice Maker Unit)

Poor motor or Hall IC within ice-maker unit, snapping/short-circuit of lead wire, or poor main PCB drive…

LG codesLG refrigerator codes

Poor motor or Hall IC within ice-maker unit, snapping/short-circuit of lead wire, or poor main PCB drive circuit; displayed during LED check only.

First step from the service manual

Check ice maker motor resistance (18-22 ohms at CON8 pins 9,10), Hall IC signal, and drive circuit.

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

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What Er (Ice Maker Unit) means on a LG refrigerator

The Er error code on an LG refrigerator ice maker unit indicates a fault detected within the ice maker's motor or Hall IC (integrated circuit) sensor, a wiring fault such as a snapped or short-circuited lead wire, or a failure in the main PCB's drive circuit for the ice maker. This code is specifically displayed during an LED diagnostic check, meaning it surfaces when the control board runs its self-test routine rather than during normal operation. The ice maker motor is responsible for rotating the ice-ejection mechanism, and the Hall IC provides positional feedback by detecting magnetic pulses from the rotating assembly.

The primary diagnostic entry point is measuring resistance across the ice maker motor at connector CON8, pins 9 and 10. A correctly functioning motor will read between 18 and 22 ohms. A reading significantly outside this range points to a failed motor winding. If resistance checks out within spec, attention shifts to the Hall IC signal, which should produce a clean pulse signal as the ice maker gear rotates. A flat or erratic signal indicates a Hall IC failure or a wiring break between the ice maker assembly and the control board.

The main PCB drive circuit must also be evaluated if the motor and Hall IC both test within normal parameters. The drive circuit on the main board supplies the switching voltage that energizes the ice maker motor. A failed transistor, relay, or other drive component on the PCB can mimic the symptoms of a motor or sensor fault. Because this fault can originate in three distinct subsystems, a systematic approach starting with wiring continuity, then motor resistance, then Hall IC signal, and finally PCB output is essential before replacing any component.

Source: manufacturer service documentation.

Common causes of Er (Ice Maker Unit)

  1. 01

    Ice Maker Motor Failure

    Part replacement

    The motor winding can fail open or short over time, producing a resistance reading outside the 18 to 22 ohm specification at CON8 pins 9 and 10. A motor reading significantly high or low confirms the motor assembly needs replacement.

  2. 02

    Broken or Short-Circuited Lead Wire

    Part replacement

    The wiring harness connecting the ice maker unit to the main board can snap or short due to repeated freezer door cycling or ice buildup putting stress on the wires. Inspect the harness visually and confirm continuity with a multimeter.

  3. 03

    Hall IC Sensor Failure

    Part replacement

    The Hall IC inside the ice maker reads the position of the rotating mechanism and sends pulse signals back to the control board. A faulty Hall IC produces no signal or an erratic signal even when the motor resistance tests within spec.

  4. 04

    Main PCB Drive Circuit Fault

    Part replacement

    If the motor and Hall IC both test correctly, the problem may be a failed drive component on the main PCB that supplies switching power to the ice maker motor. This is typically diagnosed after ruling out the ice maker unit itself.

  5. 05

    Connector Corrosion or Poor Contact at CON8

    Wiring / connection

    Moisture in the freezer compartment can corrode the connector pins at CON8, creating intermittent or high-resistance connections that trigger the error. Inspect pins 9 and 10 for oxidation or bent terminals before replacing components.

See the test procedure for each cause

Frequently asked questions about Er (Ice Maker Unit)

What does Er (Ice Maker Unit) mean on a LG refrigerator?
The Er code indicates a detected fault in the ice maker unit, specifically pointing to a failed ice maker motor, a faulty Hall IC sensor, a broken or shorted lead wire, or a problem with the main PCB's drive circuit for the ice maker. This code appears during the refrigerator's LED diagnostic check routine. It signals that the control board cannot confirm proper operation of the ice maker motor system.
Can I fix the Er ice maker error myself?
Some steps are DIY-friendly, such as inspecting the wiring harness for visible damage, checking connector pins at CON8 for corrosion, and testing motor resistance with a multimeter. If the motor reads outside 18 to 22 ohms or the wiring is damaged, replacing the ice maker unit or harness is a moderate repair that many technicians handle. Main PCB replacement typically requires more advanced diagnostics and soldering skills.
Is it safe to keep using my refrigerator when the Er code is showing?
The refrigerator's cooling functions are generally separate from the ice maker circuit, so food safety is not immediately at risk. However, the ice maker will not operate correctly while this fault is active. It is best to resolve the error promptly to prevent any secondary issues from an undetected short circuit in the harness.
How much does it cost to repair the Er ice maker error on an LG refrigerator?
Repair costs vary depending on the root cause. A replacement ice maker motor assembly typically ranges from $40 to $120 for parts. If the main PCB is at fault, board replacement can run $150 to $350 or more depending on the model. Adding professional labor generally brings total repair costs into the $150 to $450 range depending on what component needs to be replaced.
Will resetting my LG refrigerator clear the Er ice maker error?
A reset may temporarily clear the code from the display, but if the underlying fault in the motor, Hall IC, wiring, or PCB drive circuit is still present, the error will return when the next diagnostic check runs. Resetting is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and correcting the actual hardware problem.

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