mypros+
Error code reference

Jenn-Air Dishwasher Error Code 1-1

Control detected K400 pilot relay stuck closed.

Jenn-Air codesJenn-Air dishwasher codes

Control detected K400 pilot relay stuck closed.

First step from the service manual

1. Unplug dishwasher or disconnect power. 2. Check all loads on K400 pilot relay for shorts. 3. Replace control and all shorted components.

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

MyPros+ Max

Get the full diagnostic procedure for 1-1.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 1-1 means on a Jenn-Air dishwasher

The Jenn-Air dishwasher error code 1-1 indicates that the main control board has detected the K400 pilot relay in a stuck-closed condition. A pilot relay is a small switching component on the control board that opens and closes to control power to downstream loads such as the wash motor, drain pump, or heating element. When the control detects that the K400 relay has failed in the closed position, meaning it is passing current even when it should be open, it triggers this fault to prevent unintended operation of connected components.

For homeowners, think of the K400 pilot relay like a light switch that the control board operates automatically. In a stuck-closed failure, that switch is permanently on and cannot be turned off by the control board. This can cause connected parts to run at the wrong time or continuously, which can damage the dishwasher and pose a safety concern. The control board logs code 1-1 to alert you that this condition exists.

Because a stuck-closed relay can allow current to flow to loads that should be off, it is possible that one or more components connected to the K400 relay have also developed a short circuit, either causing the relay failure or resulting from it. Diagnosis requires checking all loads on that relay before replacing parts.

Source: manufacturer service documentation.

Common causes of 1-1

  1. 01

    Failed K400 pilot relay on the control board

    Part replacement

    The K400 relay itself can fail mechanically or electrically in the closed position, causing the control to detect continuous current flow through the relay circuit. This is the most direct cause of the 1-1 fault and requires replacing the control board.

  2. 02

    Short circuit in a load connected to K400 relay

    Part replacement

    A shorted motor, pump, heating element, or wiring harness connected to the K400 relay can pull excessive current through the relay, causing it to weld shut or triggering the control board to detect the stuck-closed condition. Each load on the relay circuit must be tested for shorts before replacing the board.

  3. 03

    Damaged wiring harness between control board and K400 relay loads

    Part replacement

    Chafed, pinched, or burned wiring between the control board and the components the K400 relay controls can create a short-to-ground or short-to-common condition that mimics a stuck relay. Inspecting and replacing damaged harness sections may resolve the fault.

  4. 04

    Control board firmware or detection circuit fault

    Part replacement

    In rare cases, the relay itself and all downstream loads may test normal, but an internal fault in the control board's relay monitoring circuit generates a false 1-1 code. If all connected loads check out with no shorts, the control board is the remaining suspect.

See the test procedure for each cause

Frequently asked questions about 1-1

What does error code 1-1 mean on a Jenn-Air dishwasher?
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.
Is it safe to use my Jenn-Air dishwasher while error code 1-1 is active?
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.
How do I fix error code 1-1 on a Jenn-Air dishwasher?
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.
How much does it cost to fix the 1-1 error code on a Jenn-Air dishwasher?
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.
Can a shorted pump cause the 1-1 error code on a Jenn-Air dishwasher?
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.

Related Jenn-Air dishwasher codes

All Jenn-Air dishwasher codes
View all 69 Jenn-Air dishwasher codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass