cheers for that paul,
is it worth me draining the system completely and starting from scratch would this solve the problem and if so whats the best way to drain and refill a sealed system
hi my brother inlaws had probs with is rads, warm at bottom cold at top, so decided to bleed them with out turning the combi off. the system is sealed halstead finest gold combi with 4 rads up and three rads down the combi is also upstairs.since then he only gets hot water and no heating. the...