We may have found other answers which could help you.
Click here for Intermittent Hot Water
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Ravenheat CSI 85 Red Light?
Central heating but no hot water?
how can i ignite the pilot light on a ravenheat boiler?
ravenheat csi 120 no hot water?
csi 85t ravenheat no power at fan?