need your advice on sorting this problem. Few days ago went around the flat to bleed air from a couples of radiators and since then the boiler does not work properly. When SH is ON the pressure goes from 1 to 3 and overflow pipe outside starts leaking water, after I switch the boiler OFF it looses pressure to 0 in about 4 hrs time. Refill the boiler to 1, switch it ON, pressure rising again to 3, switch it OFF and is 0 in few hrs. There is no obvious licks, what shell I do?