Coffee maker makes loud gurgling or popping noises during brewing, louder than normal operation.

Safety first: Unplug and let the unit cool before handling.

• Ensure proper fill: Always fill the reservoir to at least the minimum level before brewing.
• Descale: Run a descaling cycle to remove scale that can cause noisy boiling and steam pockets.
• Bleed air: Run a water-only cycle to purge air from the heater and tubing.
• Check heater mounting (advanced): Inspect the heater block mounting screws from the bottom. Tighten if loose to reduce vibration and noise.