BoilerFaultCodesWorcester Bosch 2949 Fault Code
The Worcester Bosch 2949 fault code means: your boiler is failing to detect a flame when it tries to work at a high power level, causing it to shut down for safety.. It appears on 5 Worcester Bosch models in our database.
Technical description: No flame signal with high output
What causes the Worcester Bosch 2949 fault?
This fault happens because the boiler’s control system cannot detect a steady flame while the burner is trying to run at full power. It is often caused by a restricted gas supply, a worn-out ignition probe that can no longer sense the flame, or a physical blockage in the burner or flue system. Because the boiler cannot confirm it is burning fuel safely at high speeds, it shuts down as a protective measure.
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 2949 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2949 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch Greenstar 1000 manual (PDF)
- Worcester Bosch Greenstar 2000 manual (PDF)
- Worcester Bosch Greenstar 27CDi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026