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Its the CXI, and it dits continually even when the boiler is not on.

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...

No, it's been serviced every year, it's due next in November. If the PRV is blocked as previously advised, then it won't blow off.... my worry is that in less than 20 seconds the pressure goes up from 1.5bar to 4bar... and then locks out. I've already booked my service engineer to...

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...