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Error code reference

Kenmore Refrigerator Error Code Er IU

Abnormal Icemaker Unit

Kenmore codesKenmore refrigerator codes

Abnormal Icemaker Unit - faulty icemaker unit, motor or Hall IC; lead wire short circuit; faulty motor driver.

First step from the service manual

Remove cover PCB, then check for any loose connection in CON8.

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

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What Er IU means on a Kenmore refrigerator

The Er IU error code on a Kenmore refrigerator indicates an abnormal condition detected in the icemaker unit. This fault is triggered when the control board receives signals outside of expected parameters from the icemaker assembly, which includes the drive motor, the Hall effect IC (integrated circuit) sensor, and the associated wiring harness. The Hall IC is a magnetic sensor that monitors the rotation of the icemaker motor. When the control board cannot confirm normal motor operation through the Hall IC feedback signal, it logs this fault and disables the icemaker.

The three primary hardware failures that produce this code are: a faulty icemaker unit or its internal motor, a defective Hall IC sensor, and a failed motor driver circuit on the icemaker PCB or main control board. A lead wire short circuit is also a recognized cause, meaning any damaged, pinched, or shorted wiring in the harness connecting the icemaker to the control board can generate this error. Because the icemaker operates in a cold, humid environment, connector corrosion and intermittent wire faults are common contributors.

The first diagnostic step is to remove the icemaker cover PCB and inspect connector CON8 for loose, corroded, or improperly seated pins. A loose connection at CON8 can mimic a component failure by interrupting the signal path between the Hall IC and the control board. If CON8 is secure and the wiring harness shows no visible damage, further testing of the motor continuity and Hall IC signal output is required to isolate the fault to a specific component.

Source: manufacturer service documentation.

Common causes of Er IU

  1. 01

    Loose or corroded connection at CON8

    Wiring / connection

    A loose, corroded, or improperly seated connector at CON8 on the icemaker PCB is the first thing to check, as it can interrupt communication between the Hall IC and the control board. Removing the icemaker cover and reseating the connector often resolves intermittent versions of this fault.

  2. 02

    Faulty icemaker motor

    Part replacement

    The drive motor inside the icemaker unit can fail mechanically or electrically, preventing the Hall IC from detecting normal rotation. A failed motor will typically require replacement of the icemaker assembly or the motor component specifically.

  3. 03

    Defective Hall effect IC sensor

    Part replacement

    The Hall IC sensor monitors motor shaft rotation and reports back to the control board. If this sensor fails, the board cannot confirm normal icemaker operation and will trigger Er IU even if the motor itself is functional.

  4. 04

    Lead wire short circuit in the harness

    Part replacement

    Damaged, pinched, or shorted wiring in the icemaker lead wire harness can cause erroneous signals or loss of continuity between the icemaker and the control board. Carefully inspect the full length of the harness for chafing, kinks, or areas where wires may contact cold metal surfaces.

  5. 05

    Faulty motor driver circuit

    Part replacement

    If the motor driver component on the control board or icemaker PCB has failed, it will be unable to properly power or communicate with the icemaker motor. This is generally diagnosed after ruling out wiring faults and the icemaker assembly itself.

See the test procedure for each cause

Frequently asked questions about Er IU

What does Er IU mean on a Kenmore refrigerator?
Er IU indicates an abnormal icemaker unit condition on a Kenmore refrigerator. The error is triggered when the control board detects a problem with the icemaker motor, the Hall effect IC sensor, the motor driver circuit, or the wiring connecting these components. The refrigerator flags this code to alert the user that the icemaker is not operating within normal parameters and has been disabled.
How do I fix the Er IU error code on my Kenmore refrigerator?
Start by removing the icemaker cover PCB and checking connector CON8 for any loose, corroded, or unseated pins, as this is the first recommended diagnostic step. If the connection is secure, inspect the icemaker wiring harness for any signs of damage or short circuits. If wiring is intact, the icemaker motor, Hall IC sensor, or motor driver circuit will need to be tested and potentially replaced.
Is it safe to keep using my refrigerator when it shows the Er IU code?
The refrigerator's cooling and food preservation functions are generally not affected by the Er IU error, as this fault is isolated to the icemaker system. However, the icemaker will not produce ice while the fault is active. It is safe to continue using the refrigerator for food storage, but the icemaker issue should be diagnosed and repaired to restore ice production.
Will resetting my Kenmore refrigerator clear the Er IU code?
A power reset may temporarily clear the Er IU code, but if the underlying fault is still present, the error will return once the icemaker attempts to cycle again. A reset alone is not a repair. The root cause, whether a loose connection, failed motor, bad Hall IC, or wiring fault, must be identified and corrected for the code to stay cleared.
How much does it cost to repair a Kenmore refrigerator with an Er IU error?
Repair costs vary depending on what component has failed. If the fix is simply reseating a loose connector at CON8, there may be no parts cost involved, and a service call fee would be the primary expense. Replacing the icemaker assembly or a control board component typically costs more, with total repair estimates ranging from around 150 dollars to 400 dollars or more depending on parts and local labor rates.

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