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