Air pressure switch ?


"Graeme Proctor" wrote in message
m...
My Potterton Profile 80 Boiler, will not start, the system is live,
the fan Kicks in and out, along burst at first, then a 5 second gap
follwed a a 2 second burst on the fan. But throughout it simply wont
fire up. I have tried using the reset button on the bottom og the
boiler but still nothing.

Does anybody have any ideas??