Ferroli Optimax OV fault codes
Built 2005–2013
Open vent range. No Optimax OV manual could be reached for this audit, so the code set it uses is unconfirmed. The claim previously made here — that it numbers faults 1 to 24 for reset and 25 to 47 for self-clearing rather than using prefixes — was a misreading: that sentence is in the condensing Optimax HE 31 C manual, above a table that uses the A and F prefixes and contradicts it.
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.
Ferroli fault codes
Every published Ferroli code. Open a code to see which models and years it applies to.
- 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