hi
a friend said her ferroli hawk boiler makes a banging noise when it fires up for a few minutes every morning, is it normal? is it due to pipes heating up or even the combi boiler metal case expanding? what do you guy and galls think?
a friend said her ferroli hawk boiler makes a banging noise when it fires up for a few minutes every morning, is it normal? is it due to pipes heating up or even the combi boiler metal case expanding? what do you guy and galls think?