Dishwasher shows E18 and may not fill correctly; sometimes indicates a low water level or short fill on certain SMEG models.

Safety first: Turn off power and close the water tap before disconnecting hoses.

• Verify water pressure: Ensure the supply tap is fully open and that household water pressure is adequate.
• Clean inlet filter: Remove and rinse the mesh filter at the tap or aqua-stop end of the hose.
• Check hose for kinks: Straighten any sharp bends behind the dishwasher.
• Inspect flow meter and pressure switch: Follow the steps for E14 and E5 to ensure accurate water measurement and level detection.
• Test cycle: Run a short program and observe the water level just after filling; it should cover the sump filter but not reach the door opening.