BoilerFaultCodesVokera 75 Fault Code
The Vokera 75 fault code means: your boiler has detected an internal electrical communication error or a wiring issue that is preventing it from working safely.. It appears on 3 Vokera models in our database.
Technical description: Wiring fault
What causes the Vokera 75 fault?
This fault occurs when the boiler's internal computer loses the ability to communicate with its electrical components. It is physically caused by loose connections in the wiring harness or a failure in the circuit board that prevents signals from being sent correctly. In some cases, electrical interference or dampness on the wires can lead to these two specific codes.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Vokera models that show the 75 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 75 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