Error code reference

KitchenAid Dishwasher Error Code 8-3

Drain stuck on

KitchenAid codesKitchenAid dishwasher codes

Drain stuck on - faulty drain motor drive circuit on the control.

First step from the service manual

1. Unplug dishwasher or disconnect power and replace control. 2. Inspect drain motor and connections for overheating/shorting. If evidence of overheating/shorting exists, replace.

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

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What 8-3 means on a KitchenAid dishwasher

Error code 8-3 on a KitchenAid dishwasher indicates the control board has detected a fault in the drain motor drive circuit. Specifically, the control is sending a signal to run the drain motor but the circuit is stuck in an active state, meaning the control board cannot properly command the drain cycle off. This points directly to a failed drain motor drive circuit on the control board itself, though evidence of overheating or a short in the drain motor or its wiring can produce the same symptom by damaging the circuit.

For homeowners, here is what is happening: your dishwasher's brain (the control board) is having trouble communicating correctly with the drain pump motor. Either the control board's internal circuitry has failed, or the drain motor has overheated or shorted, sending abnormal electrical feedback back to the control. The drain pump may run continuously or behave erratically as a result. This is not a sensor issue or a clog problem. The fix requires inspecting physical components and, in most cases, replacing either the control board or the drain motor depending on where the fault originates.

Source: manufacturer service documentation.

Common causes of 8-3

  1. 01

    Failed drain motor drive circuit on the control board

    Part replacement

    The control board's internal circuitry that drives the drain motor has failed, causing the drain signal to remain stuck in the on position. This is the primary cause indicated by the error code and typically requires replacing the control board.

  2. 02

    Shorted drain motor

    Part replacement

    A drain motor that has developed an internal short can feed abnormal current back through the circuit, damaging or confusing the control board's drain drive circuit. Visible signs of overheating or burning on the motor or its terminals confirm this cause.

  3. 03

    Damaged or shorted wiring harness at the drain motor

    Wiring / connection

    The wiring harness connecting the drain motor to the control board can short against the dishwasher's frame or overheat, creating a fault condition that mimics a failed drive circuit. Inspecting the connector and wire insulation for burn marks or melted areas will reveal this issue.

See the test procedure for each cause

Frequently asked questions about 8-3

What does error code 8-3 mean on a KitchenAid dishwasher?
Error code 8-3 means the control board has detected that the drain motor drive circuit is stuck in the on position. The control cannot properly turn off the drain command, which points to either a failed drain motor drive circuit on the control board or a shorted drain motor feeding abnormal current back into that circuit.
How do I fix error code 8-3 on a KitchenAid dishwasher?
Start by unplugging the dishwasher or shutting off power at the breaker. Inspect the drain motor, its terminals, and the wiring harness for any signs of overheating, burning, or shorting. If you find evidence of a short or heat damage, replace the drain motor and harness first. If the motor and wiring look clean, the control board itself needs to be replaced, as the fault is in the drain drive circuit on the board.
Is it safe to use my KitchenAid dishwasher with error code 8-3 active?
Running the dishwasher with error code 8-3 active is not recommended. A stuck drain motor drive circuit can cause the drain pump to run continuously or behave unpredictably, and if the underlying cause is a shorted motor or wiring, continued use risks further electrical damage to the control board or connected components. Disconnect power until the fault is diagnosed and repaired.
How much does it cost to fix KitchenAid dishwasher error code 8-3?
If only the control board needs replacement, parts typically run between $150 and $300 depending on the model, plus one to two hours of labor if hiring a technician. If the drain motor is also shorted and needs replacement, add $50 to $150 for the motor part. A homeowner comfortable with appliance repair can complete either replacement with basic tools, but working around control board wiring requires care to avoid damaging connectors.
Can a shorted drain motor cause error code 8-3 on a KitchenAid dishwasher?
Yes. A drain motor that has shorted internally can send abnormal voltage or current back through the drain motor drive circuit on the control board, triggering error code 8-3. Always inspect the drain motor and its wiring connections for burn marks or melted insulation before replacing the control board, since installing a new control board without addressing a shorted motor can damage the replacement board as well.

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