While you wait for answers, we may have found some information which could help you.
Click here for Hot Central Heating Okhow can i ignite the pilot light on a ravenheat boiler?
Faulty Worscester 35 CDi loosing pressure?
What is wrong with my ravenheat white star combination boiler,?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Central heating but no hot water?
ravenheat csi 85 b (t) hot water no central heating?