It starts with blinking slow and or filter symbol indicates 10% : this to alert you to buy/order a new AquaClean Water filter.
When it starts blinking fast and or filter symbol indicated 0% : this indicates it is time to change the filter. Replace the Saeco AquaClean filter for a new one.
Note: Always confirm the new filter in the machine menu
If the symbol stops blinking and disappears from the display: the time to be able to change the filter has passed.
Note: Before placing a new filter you now first need to descale the machine
Note: Replace the Aqua Clean filter at least every 3 months, even if the machine has not yet indicated that replacement is required. This for hygienic reasons.