We may have found other answers which could help you.
Click here for Ferroli Change PressureF40 fault?
Ferroli Optimax HE31c a26 problem?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?
Ferroli DOMIcompact F 30 D?
How can i repair a noCN fault on my boiler?
Connections on Ferroli F24 Gas Valve?