Coffee maker makes loud buzzing or rattling noises during brewing.

Safety first: Keep hands away from the underside and interior of the unit while it is operating.

• Check placement: Ensure the coffee maker is on a solid, level surface. Thin countertops or cutting boards can amplify vibration noise.
• Bleed air from system: Fill the reservoir to MAX and run 1–2 full water‑only brew cycles to purge air from the pump and lines.
• Descale: Run a descale cycle to reduce strain on the pump from mineral deposits.
• Inspect externally: Gently press on the sides and top of the housing during brewing to see if the noise changes, indicating a loose panel. If so, unplug the unit and check for accessible screws that may be tightened (only external ones).
• Internal mounts: If noise remains excessive, the internal pump mounts or brackets may be worn and require professional replacement.