While you wait for answers, we may have found some information which could help you.
Click here for Heating Boiler 85Ravenheat CSI 85 Red Light?
csi 85t ravenheat no power at fan?
ravenheat csi 85 b (t) hot water no central heating?
What is wrong with my ravenheat white star combination boiler,?
ravenheat csi 120 no hot water?
Faulty Worscester 35 CDi loosing pressure?