BoilerFaultCodesVokera AL10 Fault Code
The Vokera AL10 fault code means: your boiler has failed to light or stay lit, which is often caused by a blocked condensate pipe or a sensor detecting a problem with the ignition process.. It appears on 8 Vokera models in our database.
Technical description: Ignition failure/not flame sensed, condense sensor activated
What causes the Vokera AL10 fault?
This fault occurs when the boiler tries to ignite but fails to establish a steady flame, or if the safety sensors detect that the waste water cannot drain away properly. The most common reason is a blockage in the condensate trap or external pipework, which causes water to back up into the heat exchanger and extinguish the burner. It can also be triggered by worn ignition components that can no longer create a strong enough spark to light the gas.
This fault is frequently seen during freezing winter spells, as the external condensate pipe can freeze solid and cause the boiler to shut down for safety.
DIY fix possible
Locate the external plastic condensate pipe and check if it has frozen in cold weather.If frozen, carefully pour warm (not boiling) water over the pipe to melt the ice.Restart the boiler by turning the mode selector switch to 'Reset' and then back to the original position.
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Gas Safe Register →Vokera models that show the AL10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera AL10 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026