BoilerFaultCodesBritish Gas Fd Fault Code
Also written as FD — same fault.
The British Gas Fd fault code means: your boiler has gone into a temporary lockout mode because the reset button was held down or pressed when it wasn't necessary.. It appears on 1 British Gas model in our database.
Technical description: Reset button pressed by mistake.
DIY fix possible
Switch off the electrical power supply to the boiler at the fused spur switch.Wait for 30 seconds.Switch the power back on to clear the fault code and restart the boiler.
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British Gas models that show the Fd fault code
Click a model for the full fault code list and model-specific repair notes.
Source
British Gas Fd fault code information on this page is sourced and cross-checked against the official British Gas service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026