While you wait for answers, we may have found some information which could help you.
Click here for Turned Water Pressure Switchravenheat csi 85(t) 780 series red light flashing?
how can i ignite the pilot light on a ravenheat boiler?
ravenheat csi 120 no hot water?
Central heating but no hot water?
csi 85t ravenheat no power at fan?
ravenheat csi 85 b (t) hot water no central heating?