Machine makes unusually loud rattling or knocking noises during brewing.

Safety first: Unplug the machine before moving or opening it.

• Level the machine: Place the coffee maker on a stable, flat surface. Adjust position to reduce resonance.
• Check for loose parts: Gently shake the unplugged machine to listen for loose internal components.
• Inspect pump mounts (advanced): Open the housing and verify that the pump is securely mounted with its rubber dampers intact.
• Secure hoses: Reposition any hoses that are vibrating against the plastic housing.
• Replace pump: If the pump itself is excessively noisy, replacement may be required.