BoilerFaultCodesVokera 37 Fault Code
The Vokera 37 fault code means: your boiler has detected that the internal exhaust fan is spinning faster than it should, so it has automatically shut down for safety.. It appears on 5 Vokera models in our database.
Technical description: fan error (high rpm)
What causes the Vokera 37 fault?
This fault occurs when the boiler's control board detects that the fan is spinning at a higher speed than required for safe combustion. It is typically caused by a failing hall effect sensor within the fan motor or a software error on the main circuit board that can no longer regulate the voltage correctly.
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 37 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 37 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