Coffee maker powers on but will not start brewing; pressing the brew button does nothing.

Safety: Unplug before opening the housing; basic checks can be done with power connected but avoid internal parts.

• Check all user components: Ensure the water tank is full and properly seated, the carafe is in place, the drip-stop is open, and the brew group (if present) is fully locked in.
• Observe display icons: Many Zwilling models show icons for missing tank, carafe, or brew group. Resolve any indicated issue.
• Test buttons: Try other buttons or menu options. If only the brew button fails, the button or touch sensor may be defective.
• Inspect start button: For mechanical buttons, remove the front panel and check that the switch actuates and has continuity when pressed. Replace the switch if faulty.
• For touch panels: Reseat the ribbon cable to the UI board and clean the panel surface. If still unresponsive, replace the UI PCB.