Dishwasher displays i40 and may stop shortly after starting a program.

Safety first: Disconnect the appliance from mains power and close the water tap before removing panels.

• Run a reset: On many Zanussi models, turning the appliance off and back on and then selecting a short program can clear a one‑off glitch. If i40 returns, continue with checks.
• Clean filters and sump: Remove and clean all filters and check the sump for grease and debris that could block the pressure chamber.
• Inspect pressure hose: Access the side of the dishwasher and locate the small rubber or plastic hose running from the sump/air chamber to the pressure sensor. Remove it carefully and blow through it to clear any blockage. Rinse with hot water if greasy.
• Check pressure sensor: Ensure the sensor connector is firmly seated and free of corrosion. If you have a multimeter and service data, test the sensor; replace it if readings are out of specification.
• If unresolved: The electronic control board or sensor circuit may be faulty and should be diagnosed by a professional.