got called out to this boiler which fires the burner but drops out before the flame reaches the sensor at the back and continues to do this, also the solenoid has started to click in and out very rapidly before it fires, i've checked the aps fan and flue etc. I am thinking that it could be the minimum gas pressure set too low and wondered how to check this when the boiler wont run, is it just a case of turning the minimum pressure up a little and hoping it will run and then adjusting, or is there a better way to go about it. Also any other thoughts as to what to be checking would be much appreciated as I am recently qualified and am struggling with this.