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I have turned the boiler thermostat down to 1 and this seems to have stopped the clanking and banging for the meantime. There does seem to be a patch of damp on our bedroom ceiling which I can only assume is coming from the expansion tank? If the clanking has stopped now the stat has been...

We have just come back from holiday and have returned to the pipework and header tank of our boiler making some ungodly noises. Our bedroom is in the eves so it sounds incredibly loud, like rushing water or steam. We have only got the hot water set for an hour in the morning and hour in the...