BoilerFaultCodesWorcester Bosch 2950 Fault Code
The Worcester Bosch 2950 fault code means: your boiler has tried to start up but cannot detect a flame, meaning it cannot provide heating or hot water.. It appears on 5 Worcester Bosch models in our database.
Technical description: No flame signal following starting procedure
What causes the Worcester Bosch 2950 fault?
This fault occurs when the boiler's control system fails to detect a flame after several attempts to ignite the gas. It is usually caused by a lack of spark, a blocked gas supply, or a dirty sensor that cannot 'see' the flame even if it has successfully lit. Over time, soot buildup or wear on the internal ignition parts prevents the boiler from firing up safely.
This fault is more frequent during the first cold snap of winter when the gas valve may stick after sitting idle or when extreme cold affects the external gas supply pressure.
DIY fix possible
Check if other gas appliances (like a hob) are working to ensure gas is reaching the propertyCheck that your prepaid gas meter has creditTry resetting the boiler using the reset button on the touchscreen
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A cover plan would handle faults like 2950: no call-out fees, no surprise bills.
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Worcester Bosch models that show the 2950 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2950 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