As title suggests, I seem to have a flow problem on my Varistream digital controller. I normally work on position (3), and went to do a 'first clean' the other day and tried to increase flow to position (5). As soon as I increased to (4) or (5) it seems to keep pressurising (p) and interrupts the flow so drastically that it keeps turning the flow on/off, and hence defeating the point. Obviously, I can carry on using on position (3), but somewhats defeats the point of having a contoller to increase/decrease flow. Any suggestions/advice greatfully received!