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Error code reference

Jenn-Air Dishwasher Error Code 9-3

Diverter disk missing

Jenn-Air codesJenn-Air dishwasher codes

Diverter disk missing — control detected diverter disk in sump is missing.

First step from the service manual

Remove lower spray arm, turbo zone assembly, rear feed tube and outlet cover; and verify the round diverter disk is installed.

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

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What 9-3 means on a Jenn-Air dishwasher

Error code 9-3 on a Jenn-Air dishwasher indicates the control board has detected that the diverter disk in the sump is missing. The diverter disk is a round component seated in the sump assembly that directs water flow between the upper and lower wash zones during the cycle. The control monitors the diverter system, and when it cannot confirm the disk is present or functioning in its expected position, it throws code 9-3 and halts operation.

For homeowners, the diverter disk is essentially a traffic controller for water inside your dishwasher. It rotates to send water to either the lower spray arm or the upper rack spray arm at the right times during a wash cycle. Without it, water distribution breaks down entirely and the dishwasher cannot clean properly. The disk sits beneath the lower spray arm and turbo zone assembly, so it is not visible unless you remove those components.

This code most commonly appears after a service visit, a self-repair attempt, or following heavy use that dislodged the disk. In some cases the disk was never reseated after a previous repair. Before assuming any part has failed, physically confirm the disk is present and correctly installed by removing the lower spray arm, turbo zone assembly, rear feed tube, and outlet cover to inspect the sump.

Source: manufacturer service documentation.

Common causes of 9-3

  1. 01

    Diverter disk not reinstalled after previous service

    Wiring / connection

    The diverter disk is a loose component that sits in the sump and is easy to leave out during reassembly. If the dishwasher was recently serviced or disassembled for any reason, the disk may have been set aside and not reinstalled.

  2. 02

    Diverter disk dislodged during operation

    Wiring / connection

    Forceful water pressure, a foreign object entering the sump, or improper seating from a prior installation can knock the diverter disk out of its correct position or cause it to migrate away from where the control expects it. The disk may be present in the sump but not seated correctly.

  3. 03

    Diverter disk cracked or broken

    Part replacement

    Physical damage to the diverter disk, such as a crack or break from debris impact or heat stress, can cause it to fragment. Pieces may wash away into the drain, leaving the sump without a functional disk and triggering code 9-3.

  4. 04

    Diverter disk lost and needs replacement

    Part replacement

    If the disk cannot be located anywhere inside the dishwasher tub or sump after a thorough inspection, it has likely been expelled through the drain. A replacement diverter disk specific to the Jenn-Air model will be required to clear the code.

See the test procedure for each cause

Frequently asked questions about 9-3

What does error code 9-3 mean on a Jenn-Air dishwasher?
Code 9-3 means the control board detected that the diverter disk in the sump is missing or not in its expected position. The diverter disk is a round component that directs water to the upper and lower spray zones. Without it, the dishwasher cannot distribute water correctly and will not complete a wash cycle.
How do I fix error code 9-3 on a Jenn-Air dishwasher?
Start by removing the lower spray arm, turbo zone assembly, rear feed tube, and outlet cover to access the sump area. Verify the round diverter disk is present and seated correctly. If it is simply dislodged, reseat it and reassemble the components. If the disk is cracked, broken, or missing entirely, order a replacement diverter disk for your specific Jenn-Air model number and install it before running another cycle.
Can I still use my Jenn-Air dishwasher with a 9-3 error code showing?
No. With a 9-3 code active, the dishwasher will not distribute water properly because the diverter disk is missing from the sump. Running the unit without the disk will result in poor or no cleaning performance and could stress the pump and spray system. Resolve the diverter disk issue before running any cycles.
How much does it cost to fix error code 9-3 on a Jenn-Air dishwasher?
If the diverter disk only needs to be reseated, the repair costs nothing beyond your time. If the disk is lost or damaged and needs replacement, the part typically costs between $15 and $40 depending on the model. This is a DIY-friendly repair once you access the sump by removing the lower spray arm and turbo zone assembly. If disassembly reveals additional damage to the diverter motor or sump components, professional service may be needed, which can add $100 to $200 in labor.
Where is the diverter disk located in a Jenn-Air dishwasher?
The diverter disk sits in the sump at the bottom of the dishwasher tub. To access it, you need to remove the lower spray arm, turbo zone assembly, rear feed tube, and outlet cover. Once those components are out of the way, the round diverter disk will be visible in the sump cavity. Check that it is present, undamaged, and properly seated in its position.

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