We may have found other answers which could help you.
Click here for Boiler Hot SensorFerroli Optimax HE31c a26 problem?
Connections on Ferroli F24 Gas Valve?
Parts for ferroli optimax he 31c ?
How can i repair a noCN fault on my boiler?
Hi how to increase the water pressure on ferroli optimax 25C?
F40 fault?