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

Safety first: Keep hands away from steam vents during operation.

Steps to try:

• Fill reservoir fully: Ensure the tank is filled to the MAX line to minimize air ingestion.
• Descale: Run a descaling cycle with vinegar and water to remove scale that can cause steam pockets and popping.
• Re-seat machine: Place the coffee maker on a stable, level surface. Vibrations can amplify noise.
• Internal check (advanced): With the unit unplugged, verify that the boiler tube is firmly mounted and that rubber vibration dampers are intact.

Some gurgling is normal at the end of brewing, but persistent loud popping may indicate a heavily scaled boiler that should be replaced.