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Error code reference

Kenmore Dishwasher Error Code 4-1

Control cannot determine diverter position.

Kenmore codesKenmore dishwasher codes

Control cannot determine diverter position.

First step from the service manual

1. Check all connections in diverter motor and diverter sensor circuits. 2. Verify diverter is working during Service Diagnostic cycle. Replace diverter and/or control.

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

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What 4-1 means on a Kenmore dishwasher

The Kenmore dishwasher error code 4-1 indicates that the control board cannot determine the current position of the diverter. The diverter is a motorized valve that directs water flow between the upper and lower spray arms during the wash cycle. The control relies on a position sensor integrated with the diverter motor circuit to confirm where the diverter is at any given moment. When this feedback signal is absent, ambiguous, or outside expected parameters, the control logs a 4-1 fault and may halt normal operation.

This fault involves two primary circuits: the diverter motor circuit and the diverter sensor circuit. A failure in either one can trigger the code. Common root causes include loose or corroded connector pins at the diverter motor or sensor, a failed diverter sensor that cannot report position, a seized or mechanically failed diverter assembly that prevents movement, or a defective control board that cannot properly read the incoming sensor signal.

Diagnosing this code correctly requires inspecting all wiring connections in both the motor and sensor circuits for continuity and secure seating, then running the Service Diagnostic cycle to observe whether the diverter moves and reports position as expected. If the diverter operates normally during diagnostics, focus on intermittent wiring issues. If it does not move or the control still cannot read its position, replacement of the diverter assembly or the control board is the indicated repair path.

Source: manufacturer service documentation.

Common causes of 4-1

  1. 01

    Loose or corroded wiring connections

    Wiring / connection

    Connector pins at the diverter motor or sensor can loosen over time or corrode due to moisture exposure, interrupting the position signal to the control board. Inspect all connectors in both circuits for secure seating, corrosion, or bent pins.

  2. 02

    Failed diverter position sensor

    Part replacement

    The sensor that reports diverter position to the control board can fail electrically, sending no signal or an incorrect one. If connections are intact but the control still cannot read position, the sensor or the diverter assembly as a whole likely needs replacement.

  3. 03

    Seized or mechanically failed diverter assembly

    Part replacement

    The diverter can become stuck due to debris, wear, or a failed motor, preventing it from moving to a position the sensor can confirm. Running the Service Diagnostic cycle will reveal whether the diverter moves at all.

  4. 04

    Broken or damaged wiring harness

    Wiring / connection

    A wire in the diverter motor or sensor circuit may be broken internally or have damaged insulation causing a short or open circuit. A continuity check along the harness from the control board to the diverter will identify this condition.

  5. 05

    Defective control board

    Part replacement

    If the diverter assembly and all wiring check out correctly but the fault persists, the control board itself may be unable to send power to the motor or read the sensor signal. Control board replacement is indicated after all other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about 4-1

What does 4-1 mean on a Kenmore dishwasher?
The 4-1 error code means the control board cannot determine the position of the diverter, which is the motorized valve that routes water to the upper and lower spray arms. The fault is triggered when the diverter sensor circuit fails to provide a readable position signal. This can be caused by wiring issues, a failed sensor, a stuck diverter motor, or a faulty control board.
Can I fix the 4-1 error code myself?
A knowledgeable DIYer can address this fault by inspecting and reseating all wiring connectors at the diverter motor and sensor, which is often enough to resolve the issue if a loose connection is the cause. Running the Service Diagnostic cycle will confirm whether the diverter moves as expected. If the diverter assembly or control board needs replacement, those repairs are more involved but achievable with basic appliance repair experience and the correct parts.
Is it safe to use my Kenmore dishwasher while the 4-1 code is active?
Operating the dishwasher with an active 4-1 fault is not recommended. If the diverter cannot be confirmed to be in the correct position, water may not reach one or both spray arm levels, resulting in poor cleaning performance. In some cases, the control will prevent normal cycle completion until the fault is resolved.
How much does it cost to repair a Kenmore dishwasher 4-1 error?
Repair costs depend on what component has failed. A diverter assembly replacement typically falls in the range of $50 to $150 for the part, while a control board can range from $80 to $250 or more depending on the model. Adding professional labor will increase the total, generally bringing the repair to somewhere between $150 and $400 depending on the diagnosis.
Will resetting my Kenmore dishwasher clear the 4-1 error code?
A reset may temporarily clear the 4-1 code, but it will return as soon as the control attempts to operate the diverter and again cannot confirm its position. Resetting without addressing the underlying wiring or component failure is not a permanent solution. The fault must be diagnosed and the defective component repaired or replaced to clear the code reliably.

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