BoilerFaultCodesVokera E02 Fault Code
The Vokera E02 fault code means: your boiler is failing to light the gas, which means your heating and hot water will not work until the system is reset or repaired.. It appears on 6 Vokera models in our database.
Technical description: Limit thermostat fault
What causes the Vokera E02 fault?
This fault occurs when the boiler's control system tries to start the burner but cannot detect a flame after several attempts. The most common reason is a lack of gas reaching the burner or a failure in the ignition system that prevents the spark from creating a steady fire. It can also be caused by worn-out sensors that fail to tell the boiler that a flame is actually present.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is being supplied to the property.Ensure your gas meter has credit if you use a prepay meter.Press the 'Reset' button on the boiler control panel once to see if the system restarts.
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Gas Safe Register →Vokera models that show the E02 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E02 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