BoilerFaultCodesVokera E 05 Fault Code
Also written as E05 — same fault.
The Vokera E 05 fault code means: your boiler's internal computer is experiencing a communication error and cannot safely operate the system.. It appears on 1 Vokera model in our database.
Technical description: Internal fault (PCB)
What causes the Vokera E 05 fault?
This fault occurs when the boiler's main control board experiences an internal communication failure or a malfunction in its electronic circuitry. The most common reason is general component fatigue over time, though it can also be triggered by a sudden electrical power surge that damages the board's sensitive processors.
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 E 05 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 05 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