Jenn-Air Dishwasher Error Code 1-1

Error code 1-1 means the control board detected that the K400 pilot relay is stuck in the closed position. This relay is responsible for switching power to one or more dishwasher components, and a stuck-closed condition means the relay cannot turn off when commanded. The control board triggers this code to flag the fault before further damage occurs.

Start by unplugging the dishwasher or shutting off the circuit breaker. With power removed, test all loads connected to the K400 pilot relay for short circuits using a multimeter set to resistance mode. Any shorted component, such as a pump or motor winding reading near zero ohms, must be replaced. After replacing shorted loads, replace the control board, as the K400 relay is integrated into it and cannot be individually swapped on most Jenn-Air boards.

Yes. A short circuit in any load connected to the K400 pilot relay, including the circulation pump or drain pump, can cause or contribute to the 1-1 fault. A shorted winding in a pump motor can draw enough current to weld the relay contacts closed, triggering the code. Always test all relay-connected loads for shorts before replacing the control board, or the new board may fail for the same reason.

No, you should not continue using the dishwasher with code 1-1 active. A stuck-closed K400 relay can cause connected components such as a pump or heating element to run outside of their normal cycle, which risks overheating, flooding, or additional component damage. Disconnect power to the unit until the fault is diagnosed and repaired.

The control board for a Jenn-Air dishwasher typically costs between $150 and $350 for the part alone, depending on the model. If a shorted downstream component such as a circulation pump or drain pump also needs replacement, add $50 to $150 per part. Professional labor for this repair generally runs $100 to $200. Homeowners comfortable using a multimeter and working with appliance wiring can perform this repair themselves to reduce cost.