We may have found other answers which could help you.
Click here for 102 Modena BoilerFerroli domicondens he26 C fires up but doesn't appear to rectify ?
ferroli plus 31c has a code b2 any ideas?
How can i repair a noCN fault on my boiler?
Replace a diverter valve?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
F40 fault?