Yes i've poked a piece of wire through but it gets stuck after 3 inches (outwards towards the side of house), the piece of wire is rather large though, i can blow and suck without any resistance.
OK yesterday i was wondering this and to be honest it was difficult to tell, i carried out a continuity test with my meter between common and N/O on the APS and it seemed to kick in the solenoid and ignition for a few seconds before cutting out again, it seemed that my continuity test semi closed the circuit.
I then disconnected the plug from the APS to the PCB and let it run and carried out continuity test without the DC voltage present and it seemed that the switch was still in N/C position hence not firing the solenoid.
I got the boiler lit this morning for 20 mins and has just gone out again with the fan still running.
yes it does, the strange thing is that when the boiler is at rest the pressure switch is still detecting minimal air flow thus preventing APS from starting the fan until i suck on the red tube?? Seems to be 2 issues here?
Think i may change the fan first as you need to gently blow into the red pipe to get aps to activate.