Probably a simple question for you lot but Iv not done much in the way of repairs. My friends ICOS SYSTEM boiler make a very loud thudding and vibrating as soon as the boiler is switched on. So therefore Im thinking the pump has gone. (although the heating and hot water still works) Checked the system pressure and it is 0 bar. Would the lack of system pressure cause the pump to go?
Also if it is the pump how easy is it to change can I just buy an Ideal pump head and swap just the head
Also if it is the pump how easy is it to change can I just buy an Ideal pump head and swap just the head