BoilerFaultCodesWorcester Bosch FAIL POINT G Fault Code
Also written as FAILPOINTG — same fault.
The Worcester Bosch FAIL POINT G fault code means: your boiler has shut down because it has detected its internal temperature is too hot and is now in a safety lockout.. It appears on 1 Worcester Bosch model in our database.
Technical description: 2 lights flashing slowly (Primary Overheat)
What causes the Worcester Bosch FAIL POINT G fault?
This fault occurs when the water inside the heat exchanger exceeds a safe temperature, triggering a safety sensor to cut the power. The most common reasons are a failed pump that isn't moving water away fast enough or a physical blockage in the system causing the unit to get too hot too quickly.
This fault often appears during the first cold spell of autumn when the heating is turned on after being dormant all summer, which can cause internal pump components to seize.
DIY fix possible
Check that all radiator valves are fully open to allow water to flow.Wait for the boiler to cool down naturally.Press and hold the reset button for five seconds.
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Worcester Bosch models that show the FAIL POINT G fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch FAIL POINT G 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