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Error code reference

LG Refrigerator Error Code Er 9

Abnormal ice maker unit

LG codesLG refrigerator codes

Abnormal ice maker unit - motor unit failure, wire short circuit, or motor input failure.

First step from the service manual

Check ice maker ejection motor resistance at CON9 terminals (9,10); should be 18-22 ohms.

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
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What Er 9 means on a LG refrigerator

The Er 9 error code on an LG refrigerator indicates an abnormal condition in the ice maker unit, specifically pointing to a failure within the ejection motor system. This motor is responsible for rotating the ice maker's ejector blades, which push formed ice cubes out of the mold and into the storage bin. When the control board detects that the motor is not operating within expected parameters, it logs Er 9 and may halt ice production to prevent further damage to the assembly.

The three primary fault categories for Er 9 are motor unit failure, a wire short circuit within the ice maker wiring harness, or motor input failure caused by a loss of proper voltage or signal from the control board. The ejection motor is accessed through connector CON9 on the ice maker assembly, specifically at terminals 9 and 10. A correctly functioning motor will measure between 18 and 22 ohms of resistance across these terminals. A reading significantly outside this range, or an open/short circuit reading, confirms motor failure. A reading within range shifts suspicion toward the wiring harness or the control board's output.

Diagnostic work should begin at the CON9 connector terminals before replacing any components. Inspect the wiring harness between the ice maker and the main control board for pinched wires, chafed insulation, or loose connector pins that could cause intermittent shorts. If the wiring checks out and the motor resistance is out of spec, the ice maker motor unit typically requires replacement. In some cases, the entire ice maker assembly is replaced as a unit since the motor is not always sold separately.

Source: manufacturer service documentation.

Common causes of Er 9

  1. 01

    Failed ejection motor

    Part replacement

    The ice maker ejection motor has burned out or seized, causing it to fall outside the 18-22 ohm resistance specification when measured at CON9 terminals 9 and 10. This is the most direct cause and requires motor or ice maker assembly replacement.

  2. 02

    Wiring harness short circuit

    Wiring / connection

    A short circuit in the wiring between the ice maker and the control board can trigger Er 9 even if the motor itself is functional. Inspect the harness for pinched, chafed, or melted insulation, particularly where wires route through tight spaces or door hinges.

  3. 03

    Loose or corroded connector at CON9

    Wiring / connection

    A poor connection at the CON9 connector can interrupt the motor circuit and mimic a motor failure. Check terminals 9 and 10 for corrosion, bent pins, or a connector that is not fully seated.

  4. 04

    Motor input failure from control board

    Part replacement

    If the control board is not delivering the correct voltage or signal to the ice maker motor, the motor cannot operate and Er 9 is triggered. This is suspected when motor resistance measures correctly and wiring is intact.

  5. 05

    Ice maker assembly obstruction

    Wiring / connection

    In some cases, ice buildup or a physical obstruction can lock the ejector mechanism, causing the motor to overload and fail. Check for ice jams in the mold or around the ejector blades before condemning the motor.

See the test procedure for each cause

Frequently asked questions about Er 9

What does Er 9 mean on a LG refrigerator?
Er 9 on an LG refrigerator indicates an abnormal ice maker unit condition, specifically a problem with the ejection motor that pushes ice out of the mold. The fault can be caused by motor failure, a short circuit in the wiring harness, or a loss of proper motor input signal. The refrigerator's control board detects that the motor is not functioning correctly and logs this code, typically stopping ice production. Diagnosis starts by checking motor resistance at the CON9 connector terminals, which should read between 18 and 22 ohms.
Can I fix the Er 9 error myself on my LG refrigerator?
Some causes of Er 9, such as a loose connector at CON9 or an ice jam in the ejector mechanism, can be resolved without special tools or replacement parts. However, if the ejection motor has failed or the wiring harness is shorted, the repair requires replacing components and working with electrical connectors inside the appliance. A basic multimeter is needed to check motor resistance at terminals 9 and 10 of the CON9 connector. If you are comfortable working with appliance wiring and using a multimeter, this is a manageable DIY repair.
Will resetting my LG refrigerator clear the Er 9 code?
Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the Er 9 display, but the code will return if the underlying fault is not repaired. The error is triggered by a detected electrical or mechanical failure in the ice maker motor circuit, so a reset does not fix the root cause. If the code reappears after a reset, proceed with resistance testing at CON9 terminals 9 and 10 to identify the actual fault.
Is it safe to use my LG refrigerator while Er 9 is displayed?
The Er 9 code affects only the ice maker system, so the refrigerator's main cooling and freezing functions typically continue to operate normally. It is generally safe to continue using the refrigerator for food storage while the ice maker fault exists. However, the ice maker will likely not produce ice until the fault is corrected, and you should address a confirmed wiring short promptly to prevent potential damage to other components.
How much does it cost to repair the Er 9 error on an LG refrigerator?
Repair costs depend on which component has failed. If only a wiring connection needs to be reseated or a harness repaired, costs can be minimal. Replacing the ice maker ejection motor or the full ice maker assembly typically costs between 80 and 250 dollars in parts depending on the model, with professional labor adding another 100 to 200 dollars. Replacing the main control board, if it is the source of the motor input failure, is generally the most expensive scenario, with parts and labor potentially ranging from 200 to 500 dollars or more.

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