KitchenAid Dishwasher Error Code 8-3

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.

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.

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.

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.

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.