How to Fix / Troubleshooting

Safety: Turn off water and power before adjustments.

E17 is related to abnormal water intake, often too fast.

Check water pressure: If your supply pressure is very high, fit a pressure reducer on the dishwasher feed line as per Neff specifications.
Inspect flow meter: Access the flow meter in the water matrix and ensure it spins freely and is not bypassed by debris.
Check inlet valve: Verify that the Aquastop valve closes promptly when power is removed. Replace if it is slow or sticking.
Drain hose installation: Ensure the drain hose is not installed in a way that allows siphoning or backflow, which can confuse level detection.

After corrections, clear the error by disconnecting power briefly and run a test cycle.

Dishwasher quickly shows E17 during fill; may fill too fast or detect overfill.

Possible Causes