Whirlpool Dishwasher Error Code 9-3

Error code 9-3 means the control board detected that the diverter disk in the sump is missing. The diverter disk is a round component that routes water between wash zones. The control cannot confirm the disk is in place, so it stops the cycle and displays this fault.

You should not continue running the dishwasher with the 9-3 code active. Without a functioning diverter disk, the machine cannot properly direct water flow between wash zones, meaning dishes will not be cleaned effectively and the cycle may not complete. Running it repeatedly in this state also puts unnecessary strain on the diverter motor.

Reseating or replacing the diverter disk is a manageable DIY repair for most people. You need to remove the lower spray arm, TurboZone assembly, rear feed tube, and outlet cover, which requires no special tools beyond a screwdriver in most models. If the diverter motor itself needs replacement after the disk is confirmed present and seated, that repair is more involved and professional service may be worth considering.

Start by removing the lower spray arm, TurboZone assembly, rear feed tube, and outlet cover to access the sump area. Check whether the round diverter disk is present and properly seated. If it is dislodged, reseat it, reassemble the components, and run a new cycle. If the disk is cracked or missing, order a replacement diverter disk for your model number and install it before running the dishwasher again.

If the diverter disk is simply dislodged and just needs to be reseated, the fix costs nothing. A replacement diverter disk part typically costs between $15 and $40 depending on the model. If the diverter motor assembly has failed and needs replacement, parts can range from $50 to $120, with professional labor adding $100 to $200 on top of that depending on your area.