BoilerFaultCodesVokera A 02 Fault Code
Also written as A02 — same fault.
The Vokera A 02 fault code means: your boiler is failing to light the flame properly after three attempts, which means it has safely shut down to prevent gas from building up.. It appears on 2 Vokera models in our database.
Technical description: The burner turned off three times during a request for heat. Defective ignition transformer. Defective ignition transformer power cord (see fastons on the circuit board). Flue gas pipe obstructed or partially obstructed.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Vokera models that show the A 02 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera A 02 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 7 July 2026