Skip to main contentStart diagnosing 6-4 on your Amana dishwasher
What this code means
Float switch open - overfill switch stuck in overfill position and/or dishwasher not level, drain hose check valve not sealing, fill valve triac on control shorted, or fill valve mechanically stuck open.
First step from the service manual
Remove any items stuck under float. Verify that the float moves freely and hear click of the switch contacts. Check/adjust levelness of the dishwasher.
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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What’s available for Amana dishwasher models
Access Amana dishwasher service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.