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Leaking boilers.... I hate them. I have a problem with a glow worm 24cdi. There is a leak coming from the front of the heat exchanger, and as a result the burner is coming on for 2 or 3 seconds and then going out. After about 3 attempts it goes into lockout with F1 fault code. Is this...

Here we go... Its a strange one. I raised the pressure on a worcester 24cdi to 1.5 bar, and as I closed the the filling tap it immediately rose to 4 bar, and began to spit and boil out of the air filter on the top of the boiler, before locking out. The PRV does not operate and blow off...