The OP isn't having much look with boilers "installed" in his property, they always seem to be breaking down!. Looking over his previous posts he has had a HE24, a Keston and a Main 30 all since November. He's full of it![]()
...and including this Main 24 and not to mention his "parent's" Worcester 28i and his "friend's" back boiler.
Sorry, chum. Looks like you'll have to go somewhere else to get your advice on how to do "your" job (illegally?) from now on.
