We may have found other answers which could help you.
Click here for Boiler Completely WorkingReplace a diverter valve?
F40 fault?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
Hi how to increase the water pressure on ferroli optimax 25C?
Connections on Ferroli F24 Gas Valve?
How can i repair a noCN fault on my boiler?