While you wait for answers, we may have found some information which could help you.
Click here for Problem Going Coldravenheat csi 85(t) 780 series red light flashing?
Faulty Worscester 35 CDi loosing pressure?
csi 85t ravenheat no power at fan?
ravenheat csi 120 no hot water?
minimal hot water ?
What is wrong with my ravenheat white star combination boiler,?