BoilerFaultCodesWorcester Bosch 29 Fault Code
The Worcester Bosch 29 fault code means: your boiler has detected that although it is trying to light, it cannot confirm that a stable flame has been established, so it has shut itself down as a safety precaution.. It appears on 2 Worcester Bosch models in our database.
Technical description: Flame rectification failure
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Worcester Bosch models that show the 29 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 29 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026