Hi our glow worm easicom 28 combi bolier wasn't producing a constant flow of hot water it started running hot then cold constantly.we phoned a plumber who said it might be the plate to plate heat exchanger that might need cleaning he did this and also changed a switch of some sort but no joy. On further investigation he says its probably the combustion block heat exchanger and has advised us to get a new boiler .question is could it be repaired are is it better to buy a new one.
Thanks in advance.
Thanks in advance.