While you wait for answers, we may have found some information which could help you.
Click here for Boiler Pressure BarCentral heating but no hot water?
ravenheat csi 120 no hot water?
ravenheat csi 85 b (t) hot water no central heating?
minimal hot water ?
Faulty Ravenheat condensing boiler?
What is wrong with my ravenheat white star combination boiler,?