Machine will not start; display is on but pressing start does nothing and no error code is shown.

Safety first: Ensure hands are dry when operating the control panel.

• Check door closure: Close the door firmly until you hear the latch engage.
• Confirm program selection: Select a wash program and wait for any filling or heating prerequisites to complete.
• Inspect rack sensors: Some Winterhalter models require the rack to be fully inserted; ensure it is pushed in correctly.
• Panel test: If the start button feels unresponsive or stuck, the keypad or switch may be faulty and require replacement.