A
angelf
Holty sorry the boiler is on an s plan, its got exp. vessel and cold tank/cylinder so isnt a combi. The steam is coming from the back right hand corner. When the system was repressurised water (cold) poured out of the boiler & covered the floor of the boiler house. I was hoping that it wasnt a split heat exchanger -that did cross my mind. I know its not a lot to go on but Im hoping it may help?