Display shows E16 and the grinder runs but no ground coffee reaches the brew unit (or very little).

Safety first: Turn off and unplug the machine before reaching into the coffee chute.

Step-by-step:

• 1. Open service door: Access the area above the brew unit where ground coffee drops in.
• 2. Clear chute: Use a small brush or wooden stick to gently loosen compacted coffee in the chute. Do not use metal tools that could damage plastic parts.
• 3. Vacuum loose grounds: Use a vacuum cleaner with a narrow nozzle to remove loosened grounds from the chute and grinder outlet.
• 4. Adjust grind coarser: Set the grinder one or two steps coarser to reduce clogging, especially if using dark, oily beans.
• 5. Test with different beans: Try a medium-roast, less oily bean to see if the problem disappears.
• 6. Professional repair: If E16 persists, the grinder outlet flap or internal chute may be damaged and require replacement by Siemens service.