We may have found other answers which could help you.
Click here for Boiler Completely WorkingHow can i repair a noCN fault on my boiler?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?
Ferroli Optimax HE31c a26 problem?
Ferroli DOMIcompact F 30 D?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
Replace a diverter valve?