If brewing stops working after installing or replacing an AquaClean filter, the cause is almost always preparation, not a defective filter.
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01Check if it's a preparation issue first
- Switch off the machine.
- Remove the filter and try brewing a coffee without it.
- If that works normally, the filter itself wasn't properly prepared before installation.
Correct AquaClean preparation
Shake the filter for 5 seconds, then hold it upside down submerged in a container of water until no more air bubbles escape — this is the step most people skip or rush, and it's the most common cause of filter-related problems.
02Reinstall properly and retest
Place the correctly prepared filter back into the water tank and brew a coffee. If it now works normally, you're done — no replacement needed.
03If it still doesn't work
If brewing still fails with a properly prepared filter installed, the filter itself is likely clogged internally and needs replacing — AquaClean filters have a rated capacity and do wear out with normal use over time, independent of proper preparation.
| Test result | Meaning |
|---|---|
| Works without the filter | Filter needs proper preparation, not necessarily replacement |
| Still fails after correct preparation | Filter is clogged — replace it |