While you wait for answers, we may have found some information which could help you.
Click here for Come Wont WorkFaulty Worscester 35 CDi loosing pressure?
Faulty Ravenheat condensing boiler?
how can i ignite the pilot light on a ravenheat boiler?
csi 85t ravenheat no power at fan?
ravenheat csi 85 b (t) hot water no central heating?
Central heating but no hot water?