Hello, I`ve just moved into a property where this boiler has been laid up for a while. The problem is that when the boiler fires up no heat is getting to the radiators, in fact no heat seems to be getting out of the flow pipe from the boiler. The pump seems to be o.k but after a while the boiler cuts out, I did manage to draw some heat to one radiator after being advised to put a hose on the drain off on one of the radiators, but it`s still doing the same after removing hose ( the radiator just goes cold again & the boiler cuts out after a while, it`s as if it`s overheating itself. Anyone have any ideas, thanks in advance. There`s no manual either, if anyone could tell me where to download one I`d be grateful.