BoilerFaultCodesAlpha 0A1 Fault Code
The Alpha 0A1 fault code means: your boiler is failing to light the burner, meaning it cannot provide you with any heating or hot water.. It appears on 3 Alpha models in our database.
Technical description: Ignition failure. Check for correct gas supply (purged and valves open). Check ignition electrode position and spark. Check flame sensing electrode connections. Check gas valve operation.
What causes the Alpha 0A1 fault?
This fault occurs when the boiler's control system attempts to start a flame but fails to detect one after several tries. It is often caused by a lack of gas reaching the burner, a worn-out spark electrode that can no longer create a light, or a dirty sensor that cannot 'see' the flame once it has started.
This issue can be more frequent during extreme cold spells if the external gas regulator or pipework freezes, restricting the flow of fuel to the boiler.
DIY fix possible
Check if other gas appliances, like a cooker, are working to ensure gas is reaching the propertyCheck if your gas meter has creditPress the reset button on the boiler control panel
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Alpha models that show the 0A1 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Alpha 0A1 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026