While you wait for answers, we may have found some information which could help you.
Click here for Boiler Wont Igniteminimal hot water ?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
csi 85t ravenheat no power at fan?
Ravenheat CSI 85 Red Light?
how can i ignite the pilot light on a ravenheat boiler?
Central heating but no hot water?