Coffee is very bitter, small in volume, or drips slowly; pucks are very hard and dry.

Safety first: Allow the machine to cool before disassembling the brew group or spouts.

Step-by-step checks:

• Adjust grind coarser: While the grinder is running, turn the grind knob one step coarser and test.
• Clean brew group filter: Remove the brew group and scrub the metal filter screen with warm water and a soft brush.
• Clean coffee spouts: Use a pin or needle to clear the outlet holes, then run several rinse cycles.
• Descale: Run a full descaling cycle to clear internal restrictions.

When to call a technician: If flow remains restricted, internal hoses or valves may be blocked and require professional cleaning or replacement.