BoilerFaultCodesVokera E058 Fault Code
The Vokera E058 fault code means: your boiler has detected an issue with its incoming electrical power supply, which is often caused by a voltage surge or a fault on the main circuit board.. It appears on 4 Vokera models in our database.
Technical description: Main voltage error
What causes the Vokera E058 fault?
This fault occurs when the boiler's internal computer detects that the incoming electricity supply is outside of the safe operating range. The most common reason is a power surge or a momentary spike in voltage that has affected the main circuit board's ability to monitor power safely. In some cases, it can also be triggered by loose internal wiring or a failing component that is drawing power incorrectly.
This fault is more common during autumn and winter storms, as lightning strikes or power grid fluctuations caused by high winds can trigger electrical surges.
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 E058 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E058 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