BoilerFaultCodesVokera 29 Fault Code
The Vokera 29 fault code means: your boiler has detected an issue with the air pressure or flue gases and is currently waiting for the condition to clear before attempting to restart.. It appears on 3 Vokera models in our database.
Technical description: Temporary fault code (Refer to section 7.10)
What causes the Vokera 29 fault?
This fault happens when the boiler's internal sensors detect that the waste gases are not being cleared out of the flue safely or quickly enough. It is usually caused by a struggling fan, a blocked air tube, or a sensor that is failing to tell the brain of the boiler that it is safe to light the flame.
This issue can become more frequent during windy weather, as strong gusts can sometimes interfere with the pressure balance within the flue system.
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 29 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 29 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