Ariston F9

Ariston error code F9 indicates: Ariston Hotpoint-Ariston 3D Zone Wash MaxiSpace Dishwasher: Continuous water fill detected F9; inlet valve fails to close or triac on power board leaks current, overfilling sump..

The primary root cause for Ariston code F9 is: On Ariston dishwashers: Solenoid plunger stuck open mechanically by sand particle, or punctured triac semiconductor on main control module..

To resolve error code F9: Turn off water tap. Unplug appliance. If water still flows into tub, replace dual inlet valve assembly. If stops, inspect board triac output. Hold Start/Reset key for 5 seconds until cycle cancel chime sounds and drain pump completes sump evacuation.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Ariston code F9 persists, the physical component causing On Ariston dishwashers: Solenoid plunger stuck open mechanically by sand particle, or punctured triac semiconductor on main control module. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Mechanical Pressure Switch Contacts / Inductive Frequency Sensor across Across switch spade contacts with harness unplugged; electronic output: 40Hz–50Hz frequency signal. Expected nominal reading is Mechanical: Continuity 0.0Ω–0.2Ω (Empty: 11-12, Full: 11-14). Electronic: 20Ω–45Ω coil resistance.. Tolerance: Mechanical switch contacts must transition cleanly on gentle breath pressure. Coil ~22Ω ±5%..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.