A brew unit can become noticeably louder when it is dry, dirty or struggling to move through its normal brewing cycle. Dried coffee residue can increase resistance around the moving parts, while a lack of suitable lubrication can make the mechanism sound strained or squeaky. Cleaning the removable brew unit and allowing it to dry fully can often help. If the noise continues, the brew mechanism may need closer inspection.

Repeated clicking or knocking can happen when the brew unit is trying to move but cannot reach its correct position. Check that the brew unit is seated properly and that there are no compacted coffee grounds obstructing its movement. If the machine repeatedly attempts to reposition the unit, switch it off normally and allow it to complete its shutdown cycle before removing anything.

Yes. Coffee grounds, oils and residue can build up around the brew unit and its moving components. This can increase resistance as the mechanism compresses and releases the coffee puck, resulting in creaking, grinding or straining noises. Regular brew unit cleaning helps keep the mechanism moving freely and can prevent excessive noise developing.

Squeaking or creaking usually indicates increased friction somewhere in the brew mechanism. After cleaning, make sure the brew unit is completely dry and check any accessible moving or sliding areas for obvious contamination. Some removable brew units require periodic lubrication with a suitable food-safe lubricant, but only lubricate areas specified for your particular machine.

A harsh grinding noise should not be ignored. The brew unit may be obstructed, incorrectly positioned or struggling against excessive resistance. Stop repeatedly operating the machine and check for loose coffee grounds, a heavily compacted coffee puck or anything preventing normal movement. Continued operation while the mechanism is jammed can place additional strain on the brew drive.

If cleaning, correct refitting and routine maintenance do not improve the noise, or the brew unit repeatedly jams, fails to return to its home position or produces loud grinding or cracking sounds, further investigation may be needed. Internal drive gears, the brew unit mechanism or its motor may be worn or damaged. Avoid forcing the brew unit in or out, as this can cause additional damage.