While you wait for answers, we may have found some information which could help you.
Click here for Gas Boiler CsiCentral heating but no hot water?
Faulty Worscester 35 CDi loosing pressure?
ravenheat csi 120 no hot water?
how can i ignite the pilot light on a ravenheat boiler?
What is wrong with my ravenheat white star combination boiler,?
csi 85t ravenheat no power at fan?