Coffee is weak, watery, or tastes under-extracted even at normal strength settings.

Safety first: Allow the machine to cool before internal cleaning. Unplug before removing covers.

Step-by-step:

• 1. Adjust grind finer: While the grinder is running, move the grind selector one step finer. Test a few shots and adjust further if needed.
• 2. Increase strength/volume settings: Use the Siemens menu to increase coffee strength (bean symbol) and reduce cup volume slightly to improve extraction.
• 3. Descale the machine: Run a full descaling cycle to restore proper brew temperature and flow through the thermoblock.
• 4. Clean and inspect brew unit: Remove the brew unit, rinse thoroughly, and check seals. Replace worn O-rings with Siemens-compatible parts to prevent water bypassing the coffee puck.
• 5. Try different beans: Use freshly roasted, medium-roast beans. Very old or very light roasts can taste weak even with correct extraction.