my arrison combi boiler runs to the max pressure?
my arrison combi boiler runs to the max pressure when its running but when i turn it off and everything cools down the pressure drops to 1 bar or less if i top it up to 2 bar (recommened by the installer) when i run the heating agian it looks like the needle will go off the pressure gauge and i find myself bleeding some water out of a radiator just to get it down can anyone point me to what the prblem is?
Gary, April 2007