While you wait for answers, we may have found some information which could help you.
Click here for Heating Boiler Fault
pressure dropping on openning the hot water in my ravenheat csi 85 aboiler?
Central heating but no hot water?
ravenheat csi 85 cuts out restarts every minute ?
Faulty Ravenheat condensing boiler?
ravenheat csi 85(t) 780 series red light flashing?
how can i ignite the pilot light on a ravenheat boiler?