We may have found other answers which could help you.
Click here for Ravenheat Heating Fault
Central heating but no hot water?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Faulty Ravenheat condensing boiler?
Ravenheat CSI 85 Red Light?
What is wrong with my ravenheat white star combination boiler,?
minimal hot water ?