BoilerFaultCodes 1.35 High
Boiler Fault Code 1.35
Also written as 135 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 1.35 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 has failed to ignite because it cannot detect a flame, likely due to a sensor issue or a problem with the gas supply. (As reported on Johnson Starley Aquair S 10)
Pick your boiler brand for the 1.35 fix
Source
Information for the 1.35 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