BoilerFaultCodesWorcester Bosch 2951 Fault Code
The Worcester Bosch 2951 fault code means: your boiler is struggling to keep its burner lit and has turned itself off for safety after several failed attempts to maintain a steady flame.. It appears on 8 Worcester Bosch models in our database.
Technical description: Loss of flame too many times
What causes the Worcester Bosch 2951 fault?
This fault occurs when the boiler's internal sensors detect that the flame is unstable or keeps going out during operation. The most common reasons are a buildup of carbon on the ignition parts, a blockage in the drainage system, or an inconsistent supply of gas preventing a steady burn. After several failed attempts to keep the flame lit, the boiler shuts down as a safety precaution.
This fault is more frequent during extreme cold spells, as a frozen condensate pipe can cause water to back up into the boiler and extinguish the flame.
DIY fix possible
Check that your gas prepayment meter has credit (if applicable)Verify that other gas appliances, like a hob, are working correctly to ensure gas supplyPress the 'Reset' button on the boiler display panel onceCheck that the condensate pipe outside is not frozen or blocked
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the 2951 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2951 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 27 April 2026