macdee duo compact 6 ltr cistern problem

[amaltman47]

my cistern is pretty new but it appears to be over flowing just slightly and continually running into thetoilet bowl. space is a bit tightand without draining cistern and removing it. I cant see the problem what the solution to the problem.
ta

[jaymo1234]

the problem with your duo cistern is almost certainly the box float fouling on the syphen , just adjust the position of the float to miss the syphen or if the float is rising too high adjust the screw so that the valve is closed before the float hits the syphen, hope this helps.

[strees]

water keeps running through the system how do i stop it