BoilerFaultCodes F47 High
Boiler Fault Code F47
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F47 appears across 2 boiler brands and 13 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has lost its connection to the sensor that monitors water pressure, meaning it cannot confirm if there is enough water to operate safely. (As reported on Johnson Starley Warmaheat)
Pick your boiler brand for the F47 fix
Source
Information for the F47 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026