Klarstein coffee maker’s display works but the pump does not run; no water is drawn from the tank.

Safety first: Unplug the machine and allow it to cool before opening.

User-level steps:

• Ensure the water tank is full and correctly seated.
• Run several short brew or hot water cycles to try to prime the pump.

Internal checks (advanced):

• Access the pump and check for vibration or humming when a brew is started. If silent, test for voltage at the pump terminals (only if you are trained to work with live circuits).
• Inspect the pump inlet for blockages and the small inlet filter (if fitted).

Replace the vibration pump if the coil is open or seized. If the pump is good but not receiving power, the control board or pump driver circuit is likely faulty.