Yes m8 i have a flow controller, there is a little button on the sibe of it. Should i re calibrate it?
as i said before i could be way off the mark but heres what i did after i found it wasnt an airlock.
my controller is a varistream digital.
so basically the controllers are set to one standard setting but that setting wont suit everyones needs/ways of use.
so if the auto shut off is set too sensitive it will stop the water coming thru.
settings A - G, A being low etc... standard setting is norm at C - u may need it upto E at first, then if no good go to F.
so if u have this controller ill tell u how to turn up that setting