Machine powers on but will not start brewing; pressing start does nothing.

Safety first: Unplug the machine before reaching into the brew chamber.

• Check all removable parts: Ensure the brew unit, drip tray, and grounds container are fully inserted and seated. Remove and reinsert each until it clicks.
• Verify door closure: Close the service door firmly. If the door switch is not engaged, the machine will not start.
• Look for on-screen prompts: Some Bosch models require descaling or cleaning before brewing. Follow any displayed instructions.
• Power cycle: Turn the machine off, unplug for 2 minutes, then plug back in and try again.
• If still no response: The door switch, tray sensor, or control board may be faulty. Professional diagnosis is recommended.