We may have found other answers which could help you.
Click here for System Bled AirFerroli Optimax HE31c a26 problem?
Hi how to increase the water pressure on ferroli optimax 25C?
F40 fault?
How can i repair a noCN fault on my boiler?
ferroli plus 31c has a code b2 any ideas?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?