While you wait for answers, we may have found some information which could help you.
Click here for Combi Boiler Heathow can i ignite the pilot light on a ravenheat boiler?
csi 85t ravenheat no power at fan?
minimal hot water ?
Faulty Ravenheat condensing boiler?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Faulty Worscester 35 CDi loosing pressure?