Display shows E16; door or service panel open error, machine will not brew.

Safety: Unplug the machine before adjusting door components.

Steps:

• 1. Check door closure: Ensure the front service door is fully closed and latched. Remove any obstructions such as mis-seated brew group or hoses.
• 2. Inspect latch: Look for broken plastic on the door hook or frame. Replace damaged parts.
• 3. Test microswitch (advanced): Open the housing to access the door switch. Press it manually and listen for a click. Test continuity with a multimeter. Replace if defective.

Resolution: Replace the door switch or latch assembly if they fail mechanical or electrical testing.