We may have found other answers which could help you.
Click here for Combi Boiler Water TurnsF40 fault?
Hi how to increase the water pressure on ferroli optimax 25C?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?
Ferroli Optimax HE31c a26 problem?
I have a Ferroli FF 77 the pilot light has gone out will not stay on ?
Ferroli DOMIcompact F 30 D?