F24 High

Boiler Fault Code F24

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code F24 appears across 6 boiler brands and 27 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is heating up too quickly because water isn't flowing through the system properly, causing it to shut down to prevent overheating. (As reported on Glow-worm Ultracom 35 Store)

Pick your boiler brand for the F24 fix

Ferroli F24 1 model Glow-worm F24 13 models Heatline F24 7 models Ideal F24 1 model Saunier Duval F24 3 models Vaillant F24 2 models

Source

Information for the F24 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 31 August 2026