BoilerFaultCodesVokera 35 Fault Code
The Vokera 35 fault code means: your boiler has stopped working because the internal fan, which safely clears exhaust gases, isn't spinning or communicating correctly with the system.. It appears on 3 Vokera models in our database.
Technical description: fan error
What causes the Vokera 35 fault?
This fault occurs when the boiler's control system detects that the fan is either not spinning fast enough or has stopped altogether. The most common reason is a mechanical failure of the fan motor or a buildup of dust and debris that prevents it from rotating freely. In some cases, the main circuit board may be failing to send power or signals to the fan, causing the boiler to shut down for safety.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Search the official register for a qualified engineer in your area.
Gas Safe Register →Vokera models that show the 35 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 35 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