While you wait for answers, we may have found some information which could help you.
Click here for Combi Boiler Ravenheat Rsfcsi 85t ravenheat no power at fan?
Faulty Ravenheat condensing boiler?
ravenheat csi 85 b (t) hot water no central heating?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
What is wrong with my ravenheat white star combination boiler,?
ravenheat csi 85(t) 780 series red light flashing?