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Error code reference

Kenmore Refrigerator Error Code Er IM 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

Remove Cover PCB, check for 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 IM Unit means on a Kenmore refrigerator

The Er IM Unit error code on a Kenmore refrigerator indicates an abnormal condition detected within the icemaker unit. Specifically, the control system has identified a fault in one or more of three areas: the icemaker motor itself, the Hall effect IC sensor that monitors motor rotation, or the motor driver circuit on the PCB. The Hall IC works by detecting magnetic field changes as the icemaker's drive motor rotates through its harvest cycle. If the control board receives no signal, an erratic signal, or an out-of-range signal from the Hall IC, it flags this error to prevent the icemaker from operating in a damaged or unsafe state.

A lead wire short circuit is another common source of this code. The wiring harness running between the icemaker unit and the main or sub PCB can develop shorts due to pinching, abrasion, or moisture exposure inside the freezer compartment. A shorted lead wire can mimic a failed motor or Hall IC by sending incorrect voltage signals to the motor driver circuit. The first diagnostic step is to remove the Cover PCB and inspect the connector at CON8 for looseness, corrosion, or damaged pins, since a poor connection at that point can produce the same fault behavior as a hardware failure.

The motor driver circuit on the PCB itself can also fail, particularly if it has been subjected to voltage irregularities or if a downstream short has caused excessive current draw through the driver transistors. Diagnosing this error requires working through the signal chain systematically: starting at CON8, then checking wiring continuity, then evaluating the Hall IC output, and finally assessing the motor windings before condemning the PCB.

Source: manufacturer service documentation.

Common causes of Er IM Unit

  1. 01

    Loose or corroded connection at CON8

    Wiring / connection

    A poor connection at the CON8 connector on the PCB is the first thing to check, as it can interrupt communication between the motor driver and the icemaker unit. Inspect for bent pins, corrosion, or a connector that has partially unseated from vibration.

  2. 02

    Faulty Hall effect IC sensor

    Part replacement

    The Hall IC monitors icemaker motor rotation by detecting magnetic pulses. If this sensor fails or produces no output, the control board cannot confirm the motor is turning and triggers the Er IM Unit code.

  3. 03

    Lead wire short circuit

    Part replacement

    The wiring harness between the icemaker and the PCB can develop a short circuit from pinching, chafing against freezer components, or moisture intrusion. Use a multimeter to check for continuity between wires that should be isolated from each other.

  4. 04

    Failed icemaker drive motor

    Part replacement

    The motor that drives the icemaker harvest cycle can fail mechanically or electrically, causing the Hall IC to detect no rotation. Check motor winding resistance for an open or shorted circuit.

  5. 05

    Faulty motor driver circuit on PCB

    Part replacement

    If the motor driver circuit on the control board has failed, it may not supply correct voltage to the icemaker motor regardless of whether the motor itself is good. This is typically diagnosed after ruling out the wiring, Hall IC, and motor.

See the test procedure for each cause

Frequently asked questions about Er IM Unit

What does Er IM Unit mean on a Kenmore refrigerator?
Er IM Unit indicates an abnormal condition in the icemaker unit. The control board has detected a fault in the icemaker motor, the Hall IC sensor that monitors motor rotation, the lead wiring between the icemaker and the PCB, or the motor driver circuit. The icemaker will stop functioning while this code is active to prevent further damage.
Can I fix the Er IM Unit error myself?
Some causes are approachable for a knowledgeable DIYer. Start by removing the Cover PCB and checking that the CON8 connector is fully seated and free of corrosion, since a loose connection is the simplest and most common cause. If the connection is secure, further diagnosis requires a multimeter to check wiring continuity and motor resistance, which is more involved but still possible without specialized tools. Replacing the PCB or icemaker unit itself is a more advanced repair.
Is it safe to keep using my refrigerator with the Er IM Unit code showing?
The refrigerator's cooling system will generally continue to operate normally even when this code is active, so food safety is not immediately at risk. However, the icemaker will not produce ice while the fault is present. You should not ignore the code long-term, as an underlying short circuit in the wiring could potentially cause additional electrical issues if left unaddressed.
How much does it cost to repair the Er IM Unit error on a Kenmore refrigerator?
Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, there is no parts cost. A replacement icemaker motor or Hall IC sensor typically runs in the range of $20 to $80 in parts. A full icemaker unit replacement can range from $60 to $200 or more depending on the model, and a PCB replacement can cost $100 to $300 or higher, not including labor if you hire a technician.
Will resetting the refrigerator clear the Er IM Unit code?
A power reset may temporarily clear the code from the display, but if the underlying fault in the motor, Hall IC, wiring, or PCB is still present, the error will return once the icemaker attempts to run through a harvest cycle. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. The root cause must be diagnosed and corrected to permanently clear the code.

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