Im a retired installer but am having trouble with my own boiler.glow-worm 30 sxi system boiler.Boiler comes on when clock calls,but when it turns itself off on the boiler stat it does not come back on (shows f1 or f2 fault ignition f.last week showed f13 fault pcb)once ive reset it it fires straight away.boiler burner and igniter changed because burner seal leaking. any ideas what fault could be,im getting baffled?