While you wait for answers, we may have found some information which could help you.
Click here for Ferroli Combi HotFerroli Optimax HE31c a26 problem?
Parts for ferroli optimax he 31c ?
I have a Ferroli FF 77 the pilot light has gone out will not stay on ?
Hi how to increase the water pressure on ferroli optimax 25C?
Replace a diverter valve?
How can i repair a noCN fault on my boiler?