While you wait for answers, we may have found some information which could help you.
Click here for Ravenheat Csi 85 Boilerravenheat csi 85(t) 780 series red light flashing?
Faulty Worscester 35 CDi loosing pressure?
Ravenheat CSI 85 Red Light?
ravenheat csi 85 b (t) hot water no central heating?
csi 85t ravenheat no power at fan?
Faulty Ravenheat condensing boiler?