While you wait for answers, we may have found some information which could help you.
Click here for Ravenheat Water Combi Boilerminimal hot water ?
ravenheat csi 120 no hot water?
how can i ignite the pilot light on a ravenheat boiler?
Ravenheat CSI 85 Red Light?
Faulty Worscester 35 CDi loosing pressure?
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?