The ongoing saga of our boiler we have got the pressure corrected but now an central heating isolating valve is leaking,when last week had an engineer out to look at boiler he mentioned that the white box that houses the 3 way valve gets stuck every now and again.When last night got out another engineer that deals with worcester bosch boilers more often he took the boiler apart and tells me that apart from the isolating valve that needs fixing also the expansion vessel and also about a new fan being put in,i dont want to get fleeced by anyone, if we get work done i want it to be done by what needs to be fixed properly