sarah have no fear that the 3bar of pressure will cause your boiler to blow up.the safety valve on the boiler will open and the excess pressure will bleed out .if you wish however to reduce the pressure to 1.5 bar the you only need to open a bleed screw on any radiator and the pressure will fall.as for your radiator it sounds very much like it has a pin hole right thru you will need to replace it.
mr knowitall, October 2008
