BoilerFaultCodes 14 High
Boiler Fault Code 14
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 14 appears across 27 boiler brands and 98 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has likely overheated because the water isn't moving through the system properly or a sensor has detected an unsafe temperature. (As reported on Glow-worm Xtramax HE)
Pick your boiler brand for the 14 fix
Alpha 14 3 models Ariston 14 6 models Atag 14 1 model Atmos 14 4 models Baxi 14 6 models Biasi 14 4 models Daikin 14 3 models Ferroli 14 4 models Firebird 14 1 model Gledhill 14 1 model Glow-worm 14 12 models Grant 14 1 model Heatline 14 3 models Ideal 14 5 models Intergas 14 11 models Malvern 14 1 model Maxol 14 1 model Potterton 14 2 models Remeha 14 1 model Saunier Duval 14 8 models Sime 14 3 models Unical 14 2 models Vaillant 14 2 models Viessmann 14 1 model Vokera 14 6 models Warmworld 14 1 model Worcester Bosch 14 5 models
Source
Information for the 14 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