Breville espresso machine makes loud rattling or buzzing noises during brewing.

Safety: Unplug before opening the case. Avoid contact with live wiring.

Steps:

• Ensure the water tank is fully seated and not vibrating against the housing.
• Place the machine on a solid, level surface with a non-slip mat to reduce resonance.
• If noise persists, remove the cover and inspect the ULKA pump mounting. Tighten any loose screws and ensure rubber mounts are intact.
• Check for hoses or wires touching the case that may vibrate; reposition and secure with cable ties.

Resolution: If the pump is excessively loud and flow is reduced, replace the pump. Persistent rattling may require replacing worn vibration dampers.