BoilerFaultCodesVokera E05 Fault Code
The Vokera E05 fault code means: your boiler's main control computer is experiencing an internal error and cannot operate safely.. It appears on 1 Vokera model in our database.
Technical description: Internal fault (PCB)
What causes the Vokera E05 fault?
This fault occurs when the boiler's main control board suffers a hardware failure and can no longer process data or send signals to other components. It is often caused by an electrical surge or the natural degradation of the solder joints and capacitors on the circuit board over time. Because the board acts as the brain of the system, the boiler stops immediately to prevent unpredictable or unsafe operation.
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 E05 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E05 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