BoilerFaultCodes 24 High
Boiler Fault Code 24
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 24 appears across 26 boiler brands and 116 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 that the water returning from your radiators is hotter than the water leaving the boiler, which usually means there is a circulation problem or a sensor fault. (As reported on Intergas Combi Compact ECO RF)
Pick your boiler brand for the 24 fix
Alpha 24 25 models Atag 24 1 model Atmos 24 4 models Baxi 24 7 models Biasi 24 4 models Chaffoteaux 24 5 models Daikin 24 3 models Dimplex 24 2 models Ferroli 24 4 models Gledhill 24 1 model Glow-worm 24 1 model Halstead 24 5 models Heatline 24 3 models Ideal 24 9 models Intergas 24 11 models Main 24 5 models Malvern 24 1 model Maxol 24 1 model Potterton 24 7 models Remeha 24 3 models Saunier Duval 24 2 models Sime 24 2 models Unical 24 2 models Vaillant 24 1 model Vokera 24 6 models Warmworld 24 1 model
Source
Information for the 24 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