We may have found other answers which could help you.
Click here for Combi Water TapsHow can i repair a noCN fault on my boiler?
Replace a diverter valve?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?
F40 fault?
I have a Ferroli FF 77 the pilot light has gone out will not stay on ?
Ferroli Optimax HE31c a26 problem?