Coffee maker vibrates excessively or makes rattling noises on the counter during brewing.

Safety first: Unplug before tightening any screws or accessing internal parts.

Stabilize the unit:

• Place the coffee maker on a flat, level surface.
• Check that all rubber feet are present and not worn; replace if missing or hardened.

Internal tightening:

• Remove the bottom cover and check for loose screws securing the heating element, pump, and internal brackets.
• Tighten as needed and add vibration-damping pads if appropriate.