We may have found other answers which could help you.
Click here for Boiler Heating Pressure Loss
F40 fault?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
Replace a diverter valve?
FF360 Reset Button Problem?
ferroli plus 31c has a code b2 any ideas?
How can i repair a noCN fault on my boiler?