gainbrough 8.5e shower problem?

I have same problem with an 8.5scl that worked fine for 1 year then suddenly hot low flow with no effect from control knob. I removed the headset then the pipe then checked the inlet filter then took it all off and checked the inlet pressure - all fine. I have just ordered a new engine for it (£45) to see if it cures it. I'll let you know if it does.

Mark
December 2009