We may have found other answers which could help you.
Click here for Ferroli Boiler Fine HotParts for ferroli optimax he 31c ?
Hi how to increase the water pressure on ferroli optimax 25C?
F40 fault?
Connections on Ferroli F24 Gas Valve?
ferroli plus 31c has a code b2 any ideas?
Ferroli Optimax HE31c a26 problem?