1.17 High
Boiler Fault Code 1.17
Also written as 117 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 1.17 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is not detecting that the burner has successfully lit, so it has shut down as a safety precaution. (As reported on Johnson Starley Aquair S 10)
Pick your boiler brand for the 1.17 fix
Source
Information for the 1.17 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 7 July 2026