what are the corect working pressures on a worcestewr bosch 24irsf combi as mine reads 1 bar at cold then rises to 2.3 bars at full working temp is this excesive
1 to 1.5 bar when cold is normal, and it will rise when the heating system is hot to about 2.2 to 2.5 bar max, if it does rise higher there is a automatic pressure relief valve which will activate if the pressure rises over 3bar
