While you wait for answers, we may have found some information which could help you.
Click here for We Cannot Pilot Lightravenheat csi 85(t) 780 series red light flashing?
csi 85t ravenheat no power at fan?
Faulty Worscester 35 CDi loosing pressure?
What is wrong with my ravenheat white star combination boiler,?
Faulty Ravenheat condensing boiler?
Ravenheat CSI 85 Red Light?