Coffee maker makes loud banging, rattling, or vibrating noises during operation.

Safety first: Unplug the unit before opening the housing.

• Check placement: Ensure the Tristar coffee maker is on a stable, level surface and not touching other appliances or walls.
• Descale: Run a descaling cycle to reduce cavitation noise in the pump caused by scale and air bubbles.
• Inspect pump mounts (advanced): Remove the bottom cover and locate the vibration pump. Confirm that its rubber mounts or brackets are intact and that the pump is not touching the plastic housing directly. Tighten screws or replace mounts as needed.
• Tighten loose parts: Check for any loose screws or panels inside the housing and secure them.

Note: Some vibration is normal, but loud banging indicates a mounting or flow issue.