Machine makes a loud buzzing sound but no water comes out.

User-level steps:

• Fill the water tank fully and ensure it is properly seated.
• Run several large-cup cycles without a capsule to purge air.
• Tap the machine gently on the side while the pump runs to help clear airlocks.

Technical steps:

• Open the housing and inspect the inlet hose, pump, and outlet hose for kinks or blockages.
• Clean or replace the small inlet filter at the pump.
• Descale the machine thoroughly to clear internal scale buildup.