BoilerFaultCodesBritish Gas 50 Fault Code
The British Gas 50 fault code means: your boiler has detected an internal communication error between its main control components or a faulty sensor, meaning it cannot process the signals needed to provide heating.. It appears on 1 British Gas model in our database.
Technical description: Heat output: 13.7 kW | Heat input: 13.9 kW | Gas vol. flow rate: 24.2 (l/min at tV/tR = 80/60°C)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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British Gas models that show the 50 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
British Gas 50 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