Ferroli Optimax OV fault codes
Built 2005–2013
Open vent range. Numbers faults 1 to 26 for lockouts and 30 to 46 for auto-resetting faults rather than using the A and F prefixes.
Codes on the Optimax OV follow the same Ferroli scheme as the rest of the range. Where a code behaves differently on this generation, the code page says so.
Fault codes
All Ferroli codes that apply to this model.
- A01The burner failed to light and the appliance has locked out. Ferroli list a blocked siphon as a cause, which is worth checking early.Get it checked
- F37System water pressure is outside the correct range. Because this is an F code it clears by itself once you top the system back up.Usually simple to fix
- A03High limit protection has operated. Ferroli point at circulation and at the flow sensor position, and both are worth checking.Get it checked
- A05The fan tachometer signal has been missing for an hour or more. The appliance has stopped and needs an engineer.Get it checked
- A02A flame is being detected while the burner should be off. Switch the appliance off and get a Gas Safe engineer to it.Stop — call an engineer
- F07Flue gas temperature has stayed above 95°C for more than two minutes. Three of these in a day becomes a permanent A04 lockout.Get it checked