Display shows E08 and the machine reports a general internal error; often associated with erratic behavior.

Safety first: Disconnect the appliance from mains power before opening any covers.

• Power cycle: Unplug the machine for at least 10 minutes to discharge internal capacitors, then reconnect and test.
• Check environment: Avoid plugging the coffee maker into the same outlet as heavy appliances (microwaves, fridges) that can introduce electrical noise. Use a surge protector if possible.
• Inspect connectors (advanced): Remove the housing and gently reseat all multi-pin connectors on the main PCB and display board. Look for signs of corrosion, burning, or moisture.
• Check for liquid ingress: Inspect around the control panel and top cover for signs of steam or water leaks that may have dripped onto the electronics. Address any gasket or seal issues before replacing boards.
• If E08 remains: The main control board or a communication bus component is likely defective. Replacement of the PCB should be done by a qualified technician due to mains voltage and programming requirements.