We may have found other answers which could help you.
Click here for Boiler Working HeatingHi how to increase the water pressure on ferroli optimax 25C?
Parts for ferroli optimax he 31c ?
How can i repair a noCN fault on my boiler?
Ferroli DOMIcompact F 30 D?
Connections on Ferroli F24 Gas Valve?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?