BoilerFaultCodesVokera E 16 Fault Code
Also written as E16 — same fault.
The Vokera E 16 fault code means: your boiler's electronic control system has detected an internal failure, which is preventing it from operating correctly.. It appears on 2 Vokera models in our database.
Technical description: Internal fault (PCB)
What causes the Vokera E 16 fault?
This fault occurs when the boiler's internal computer chips or electrical circuits suffer a hardware failure, meaning the board can no longer process data or send signals to other parts of the boiler. It is often caused by long-term heat exposure degrading the components or a sudden electrical surge that damages the delicate circuitry. Because the 'brain' of the boiler is damaged, it shuts down as a safety precaution.
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 16 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 16 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