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