While you wait for answers, we may have found some information which could help you.
Click here for Light Boiler LockI have a Ferroli FF 77 the pilot light has gone out will not stay on ?
Connections on Ferroli F24 Gas Valve?
How can i repair a noCN fault on my boiler?
Hi how to increase the water pressure on ferroli optimax 25C?
Ferroli Optimax HE31c a26 problem?
F40 fault?