Dishwasher will not start; display shows F01 shortly after power-on or program selection.

Safety first: Disconnect the dishwasher from mains power and close the water tap before removing any panels or hoses.

• Check water tap: Ensure the household water tap feeding the dishwasher is fully open and that other taps in the house have normal pressure.
• Inspect inlet hose: Pull the dishwasher out slightly, verify the inlet hose is not kinked or crushed. Straighten any sharp bends.
• Clean inlet filter: Close the water tap, unscrew the inlet hose from the tap, and remove the small mesh filter in the hose end. Rinse under running water and reinstall.
• Reset power: Restore power and water, then restart a short program to test. If F01 returns immediately, the inlet valve or Aquastop assembly may be defective and should be tested with a multimeter and replaced if open-circuit or not actuating.