BoilerFaultCodesVokera 50-59 Fault Code
Also written as 5059 — same fault.
The Vokera 50-59 fault code means: your boiler's main control unit has identified a critical internal malfunction, meaning it cannot safely operate and has shut down to protect itself.. It appears on 3 Vokera models in our database.
Technical description: internal PCB failure
What causes the Vokera 50-59 fault?
This fault occurs when the boiler's internal computer experiences a brief communication delay or a 'software hiccup' between its electronic components. It is usually caused by a momentary fluctuation in the electrical supply or a temporary glitch in the main control board's processing cycle. The boiler displays these numbers while it pauses to perform an automatic self-check and reboot sequence.
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 50-59 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 50-59 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