Thank you for your reply. System preasure is 0.3 bar. we don't have a filling loop and installer never instructed us to do anything. We did have two telephone numbers for him but they both go onto answer phones. I think this is understandable because he might be away and was able to install it...
I had a new boiler put in last week. Because of holidays I can't get hold of the fitter. The boiler is a valliant ecotec. It is deisplaying fault F.22 and the manual says This is a dry fire fault and that "You can only start up the appliance again when the heating system is sufficently filled...
