While you wait for answers, we may have found some information which could help you.
Click here for Combi Hot Water TapCentral heating but no hot water?
ravenheat csi 85 b (t) hot water no central heating?
Faulty Ravenheat condensing boiler?
Faulty Worscester 35 CDi loosing pressure?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
csi 85t ravenheat no power at fan?