BoilerFaultCodesVokera E 15 Fault Code
Also written as E15 — same fault.
The Vokera E 15 fault code means: your boiler's internal computer has encountered a serious error and can no longer control the system, meaning your heating and hot water will not work.. It appears on 1 Vokera model in our database.
Technical description: Internal fault (PCB)
What causes the Vokera E 15 fault?
This fault occurs when the boiler's internal computer, the Printed Circuit Board, suffers a critical electronic failure or a breakdown in communication with its sensors. The most common reason is general wear and tear of the electrical components, though power surges or moisture getting onto the board can also trigger this shutdown.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Vokera models that show the E 15 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 15 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 27 April 2026