F27 High

Boiler Fault Code F27

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code F27 appears across 3 boiler brands and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has sensed a flame when there shouldn't be one, or has detected a flickering signal that suggests the internal electronics are confused. (As reported on Glow-worm Easicom 24)

Pick your boiler brand for the F27 fix

Glow-worm F27 1 model Heatline F27 7 models Ideal F27 1 model

Source

Information for the F27 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