Ground coffee appears too coarse or too fine regardless of grind setting changes.

Safety first: Unplug the machine before adjusting or disassembling the grinder.

Step-by-step:

• 1. Observe grind change: Change the grind setting and brew several coffees. If grind size does not change at all, the adjustment mechanism may be disconnected.
• 2. Check selector knob: Ensure the external grind selector moves smoothly and is not cracked or slipping on its shaft.
• 3. Internal inspection (advanced): Remove the top cover to access the grinder. Check that the adjustment ring engages the burr carrier and that gears are intact.
• 4. Professional repair: Replacement or realignment of the adjustment mechanism requires partial disassembly of the grinder and should be done by Siemens service.