F15 High

Boiler Fault Code F15

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code F15 appears across 6 boiler brands and 23 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected a mechanical issue with the part that controls the flow of gas, preventing it from lighting safely. (As reported on Glow-worm Xtramax HE)

Pick your boiler brand for the F15 fix

Ferroli F15 9 models Glow-worm F15 3 models Ideal F15 3 models Intergas F15 3 models Johnson Starley F15 1 model Saunier Duval F15 4 models

Source

Information for the F15 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