Dishwasher displays E15 and may not start; often related to communication or internal sensor errors on some SMEG platforms.

Safety first: Disconnect mains power before opening the control panel or base.

• Inspect control board area: Remove the inner door panel to access the main PCB. Check for signs of moisture, corrosion, or burnt components.
• Check connectors: Reseat all multi-pin connectors to the board, especially those leading to sensors (NTC, turbidity, pressure switch).
• Dry moisture: If condensation or a minor leak has dampened the board, allow it to dry completely (24 hours in a warm, dry environment) before retesting.
• Inspect harness: Follow the wiring harness along the door and base for pinched or broken wires.
• Professional diagnosis: If E15 persists, the control board or a sensor bus component may be defective and should be tested and replaced by a technician.