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 one, fitted it, problem fixed or so I thought but no that was too easy. Pessure is still rising its now taking 24 hours to increase by 1bar & I'm getting fed up draining it off every day! The detachable water pipe is NOT connected so the increase is pressure is not comming from there.
Any help please!!
Any help please!!