Hi there and thanks for looking!
I have a baxi bermuda 552 back boiler thats started to make a loud banging noise that travels all the way up my house? Its like someones hitting the radiators with a hammer!
To make matters worse, when anyone (plumbers) come to look at it, it refuses to do this and its driving me and my neighbour mad?
The gas valve and thermocouple have been replaced as well as a new radiator pump fitted all to no avail. please help.
p.p. my hot waters gravity fed