Coffee is very weak or watery even on the strongest setting.

Safety first: Unplug the machine before adjusting internal components.

User adjustments:

• Adjust grinder: While the grinder is running, turn the grind selector towards a finer setting (per Melitta instructions).
• Increase strength: Use the strength or aroma button to select a higher coffee dose.
• Use fresh beans: Use freshly roasted, medium-dark beans. Very old beans produce weak coffee.

Advanced:

• If coffee remains weak, the grinder burrs may be worn and require replacement.
• A leaking bypass valve in the brew circuit can also reduce extraction and may need service.