Error code reference
KitchenAid Dishwasher Error Code 6-4
Float switch open
Float switch open - overfill switch stuck in open position, dishwasher not level, drain hose check valve not sealing, fill valve triac shorted, fill valve mechanically stuck open, too many suds, or open fuse.
First step from the service manual
Remove any items stuck under float. Verify that the float moves freely and you hear the click of the switch contacts. Check levelness of dishwasher. Measure switch resistance.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- 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
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