We may have found other answers which could help you.
Click here for Pressure Boiler SittingFerroli DOMIcompact F 30 D?
Ferolli Optimax HE 31C expansion vessel change?
Replace a diverter valve?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
How can i repair a noCN fault on my boiler?
ferroli plus 31c has a code b2 any ideas?