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Error code reference

Kenmore Refrigerator Error Code I/M unit

Abnormal Icemaker Unit

Kenmore codesKenmore refrigerator codes

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

First step from the service manual

Check for loose connection in CON8, then remove tray ice and icemaker unit to check connections.

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 I/M unit means on a Kenmore refrigerator

The I/M unit error code on a Kenmore refrigerator indicates an abnormal icemaker unit condition. This fault is triggered when the control system detects a problem within the icemaker assembly itself, specifically involving the icemaker tray motor, the Hall effect IC (integrated circuit) used for motor position sensing, the lead wire harness connecting the icemaker to the main board, or the motor driver circuit. The Hall IC monitors motor rotation by detecting changes in a magnetic field as the motor turns. If the IC fails to detect proper rotation signals, or if the motor driver on the control board cannot deliver the correct output, the system flags this error.

The first diagnostic step is to inspect connector CON8 for loose, corroded, or improperly seated pins. A loose connection at CON8 can interrupt the signal or power path to the icemaker unit and trigger the fault without any mechanical failure being present. After confirming CON8 is secure, the ice tray should be removed and the icemaker unit itself should be pulled out to allow a closer inspection of the wiring harness and connectors at the unit level.

If all connections are confirmed secure, the fault points toward either a failed icemaker motor, a defective Hall IC within the icemaker unit, a short circuit in the lead wiring between the icemaker and control board, or a faulty motor driver circuit on the main control board. Because the Hall IC and motor are typically integrated into the icemaker assembly, a failure in either component usually requires replacing the full icemaker unit. If the motor driver is the root cause, the main control board will need replacement.

Source: manufacturer service documentation.

Common causes of I/M unit

  1. 01

    Loose or faulty connection at CON8

    Wiring / connection

    A loose, corroded, or improperly seated connector at CON8 can interrupt power or signal to the icemaker unit and trigger the error without any internal component failure. This is the first thing to check and the easiest to resolve.

  2. 02

    Failed icemaker tray motor

    Part replacement

    The motor that rotates the ice tray can fail mechanically or electrically, preventing the icemaker cycle from completing. A non-rotating tray motor will cause the Hall IC to report no movement, triggering the fault.

  3. 03

    Defective Hall effect IC

    Part replacement

    The Hall IC monitors motor rotation by sensing magnetic field changes. If the IC fails, it sends incorrect or no feedback signals to the control board, which interprets this as an abnormal icemaker condition even if the motor itself is functional.

  4. 04

    Lead wire short circuit

    Part replacement

    A short circuit in the wiring harness between the icemaker unit and the main control board can disrupt communication and power delivery. Inspect the lead wires for pinching, chafing, or damage caused by ice buildup or mechanical contact.

  5. 05

    Faulty motor driver on the main control board

    Part replacement

    If the motor driver circuit on the main control board cannot deliver the correct voltage or signal to operate the icemaker motor, the icemaker unit will not function properly. This is typically diagnosed after ruling out the icemaker unit and wiring as the source of the fault.

See the test procedure for each cause

Frequently asked questions about I/M unit

What does I/M unit mean on a Kenmore refrigerator?
The I/M unit error code means the refrigerator has detected an abnormal condition in the icemaker unit. This fault is associated with a faulty icemaker motor, a defective Hall effect IC used for motor position sensing, a short circuit in the lead wiring, or a failed motor driver circuit. The refrigerator flags this code when the icemaker fails to operate within expected parameters. Diagnosing it starts with checking connector CON8 and inspecting the icemaker wiring and unit connections.
Can I fix the I/M unit error on my Kenmore refrigerator myself?
A homeowner comfortable with appliance repair can start by checking for a loose connection at the CON8 connector and inspecting the icemaker wiring harness for visible damage. Removing the ice tray and icemaker unit to access and reseat connectors is also a reasonable DIY step. However, if the issue is a failed icemaker motor, defective Hall IC, or faulty motor driver on the control board, those repairs typically require replacing the icemaker assembly or the main board, which may be better handled by a technician.
Is it safe to use my refrigerator when the I/M unit error is displayed?
Yes, the refrigerator itself should continue to cool and operate normally even when this error is active. The I/M unit code is specific to the icemaker system and does not indicate a problem with the compressor, sealed system, or food storage functions. However, the icemaker will not produce ice until the fault is resolved. You can continue using the refrigerator while you arrange for diagnosis or repair.
How much does it cost to repair the I/M unit error on a Kenmore refrigerator?
Repair costs depend on the root cause. If the issue is simply a loose connection, there may be no parts cost at all. Replacing an icemaker unit assembly typically ranges from around 80 to 200 dollars for the part, plus labor if a technician is involved. If the main control board is at fault due to a failed motor driver, board replacement can range from 150 to 350 dollars or more depending on the model. Getting a diagnosis before purchasing parts helps avoid unnecessary expense.
Will resetting my Kenmore refrigerator clear the I/M unit error code?
A power reset may temporarily clear the error code, but if the underlying fault is still present, the code will return once the refrigerator attempts to run the icemaker cycle again. Resetting the unit is not a fix for a failed motor, defective Hall IC, wiring short, or faulty motor driver. The error should be properly diagnosed and the root cause corrected to prevent the code from recurring.

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