Philips City line FC8404/01 Mode D'emploi page 10

ENGLISH
10
C
4 Close the slide on the handgrip.(specific types only)
C
5 Check if the nozzle, tube or hose is blocked up.
6 To remove the obstruction, disconnect the blocked-up item
and connect it (as far as possible) the other way around. Switch
the vacuum cleaner on to force the air through the blocked-up
item in opposite direction.