BoilerFaultCodesVokera 13 Fault Code
The Vokera 13 fault code means: your boiler has detected an electrical communication problem within its internal wiring which is preventing it from running safely.. It appears on 4 Vokera models in our database.
Technical description: check the wiring harness
What causes the Vokera 13 fault?
This fault occurs when the boiler's internal components lose the ability to speak to one another through the electrical wiring. It is usually caused by a loose connection, a damaged wire within the main harness, or a failing computer board that can no longer process signals. Because the boiler cannot confirm that all parts are working safely, it shuts down as a precaution.
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 13 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 13 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