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