BoilerFaultCodesFerroli A01 Fault Code
The Ferroli A01 fault code means: your boiler has failed to light the flame, which means you currently have no heating or hot water.. It appears on 12 Ferroli models in our database.
Technical description: No burner ignition – possible electrode error, defective gas valve or incorrect inlet gas pressure
What causes the Ferroli A01 fault?
This fault occurs when the boiler's control system attempts to light the burner but fails to detect a steady flame after several tries. The most common reasons include a worn-out ignition spark electrode that can no longer create a spark, or a gas valve that isn't opening correctly to allow fuel into the burner.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the property.Verify that your gas prepaid meter has credit, if applicable.Press the 'Reset' button on the boiler control panel once to see if the system restarts.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Ferroli models that show the A01 fault code
Click a model for the full fault code list and model-specific repair notes.
- Arean Repair: £120-250
- Arena 30A Repair: £120-250
- BlueHelix Pro 25C Repair: £100-350
- BlueHelix Pro 32C Repair: £100-350
- Bluehelix Tech Repair: £100-350
- Domiproject Repair: £100-£280
- Econcept 100 Repair: £120-250
- iBoiler 24 Repair: £100-280
- iBoiler 28 Repair: £90-280
- Modena HE Repair: £120-£350
- Optima 201 Repair: £120-250
- Optimax Repair: £100-280
Source
Ferroli A01 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026