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Hi all, I posted here a while back about a horrible knocking noise from an old boiler system. One thing led to another and we actually ended up having a new system fitted. We now have a combi boiler installed in the attic (most of the pipes were up there any way). It works a dream apart from...

Hi all, I've been trudging the net trying to find a solution to this problem. I'm pretty handy so willing to have a go myself if anyone has any advice. We moved to a new house in October, and as the weather got colder we've noticed a violent banging coming from the central heating when it...