BoilerFaultCodesVokera 1x Fault Code
Also written as 1X — same fault.
The Vokera 1x fault code means: your boiler is unable to light the gas or cannot tell that the flame is lit, so it has shut down for safety.. It appears on 3 Vokera models in our database.
Technical description: Fault codes 1x appear when the burner has failed to ignite or the flame supervisione system has failed to detect a flame.
What causes the Vokera 1x fault?
This fault occurs when the boiler tries to start but fails to create or maintain a steady flame. It is usually caused by a lack of gas reaching the burner, a worn-out spark plug that cannot ignite the fuel, or a dirty sensor that fails to 'see' the flame even when it is lit. In some cases, a fault with the main control board means the boiler doesn't send the signal to start the ignition process at all.
This fault is more common during the first cold snap of winter, as gas valves can occasionally stick after being inactive during the summer months.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck your gas meter credit or ensuring the external gas valve is openPress the 'Reset' button on the control panel once to see if the boiler restarts
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Vokera models that show the 1x fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 1x 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