BoilerFaultCodesVokera E 11 Fault Code
Also written as E11 — same fault.
The Vokera E 11 fault code means: your boiler's internal electronic brain has encountered a serious error and is unable to operate safely, causing the system to shut down.. It appears on 2 Vokera models in our database.
Technical description: Internal fault (PCB)
What causes the Vokera E 11 fault?
This fault occurs when the boiler's main control board suffers a critical electronic failure or a loss of communication between internal components. It is often caused by a voltage surge in the mains electricity or by moisture getting onto the circuitry, which prevents the board from safely managing the boiler's functions.
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 11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 11 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