Replacement heat exchanger now fitted pressure is now holding & correct.Strait forward job it took about an hour & a half with a cup of tea & a cig! Thanks to all that gave advice. :D
My 12 year old Worcester heatslave 15/19 oil fired combi boiler has been misbehaving recently. A few months ago the pressure started rising initially about 1 bar over a period of a week & so I checked the expansion vessel & when I pressed the valve water came out so I trotted off & bought a new...