BoilerFaultCodesVokera E27 Fault Code
The Vokera E27 fault code means: your boiler has shut itself down for safety because a critical fault or overheating has been detected.. It appears on 1 Vokera model in our database.
Technical description: The safety devices have been activated (lockout)
What causes the Vokera E27 fault?
This fault occurs when the boiler's internal safety sensors detect that the system is getting dangerously hot or that water isn't moving through the unit correctly. The most common reasons are a failed pump that isn't circulating water or a faulty limit thermostat that is incorrectly reporting a high temperature.
This issue often surfaces when the heating is first turned on in autumn, as pumps can seize up after being inactive throughout the summer.
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 E27 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E27 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