While you wait for answers, we may have found some information which could help you.
Click here for Open Hot Waterravenheat csi 120 no hot water?
ravenheat csi 85 b (t) hot water no central heating?
Faulty Worscester 35 CDi loosing pressure?
Faulty Ravenheat condensing boiler?
csi 85t ravenheat no power at fan?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?