BoilerFaultCodesVokera 79 Fault Code
The Vokera 79 fault code means: your boiler has detected an internal communication error or a temporary processing fault that is preventing it from running properly.. It appears on 3 Vokera models in our database.
Technical description: Temporary fault code (Refer to section 7.10)
What causes the Vokera 79 fault?
This fault occurs when the boiler's internal computer experiences a software glitch or loses communication with the sensors and valves it controls. The most common reason is a momentary power fluctuation or a breakdown in the wiring connections that prevents the main control board from processing data correctly.
DIY fix possible
Locate the mode selector switch on the front panelTurn the switch to the 'OFF/RESET' position and wait for 10 secondsTurn the switch back to either 'Hot Water Only' or 'Heating and Hot Water' to see if the error clears
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Gas Safe Register →Vokera models that show the 79 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 79 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