09. Suction engine turns on, but does not suck

Suction engine turns on, but does not suck; the the float rises but suction stops.

1) Remove the head

2) Check that the anti-foam kit is not blocked by dirt

3) In this case it is best to remove the anti-foam kit for cleaning

4) After cleaning, reassemble the anti-foam kit by turning it clockwise

5) CAUTION: Be sure to direct the float in the anti-foam kit so that the TOP is upwards