if i set the pressure to 1 bar, turn heating on the pressure climbs to 2.6 bar or higher and starts flashing. if i set the pressure to o.6 bar, turn heating on pressure climbs to 2.4 bar and is ok but when heating goes off pressure drops to o.5 bar and the red light flashes is this nomal.

robert, November 2006

If the pressure rises rapidly when adding water the expansion vessel has probably lost air. Also check the pressure relief valve outside to see if this is losing water. If it is you will need to pump in more air to the expansion vessel which needs to be 0.5 bar

DAS, February 2007