I have installed new combi Ravenheat March this year. yesterday fan
would run but boiler wouldnt fire up, called out engineer as it is
still in guarantee, he took of casing and found water coming in round
ring plate of vertical flu, having checked flashings etc there was no
sign of water coming through , is it possible for rain to be driven
under flu terminal plate and down inner flu pipe, i am afraid of it
happening again, never happened before. cant put flu horizontal, to
near soffit. any ideas??