BoilerFaultCodes overheat fault High
Boiler Fault Code overheat fault
Also written as OVERHEATFAULT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code overheat fault 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 detected that it is running too hot and has automatically shut itself down to prevent damage. (As reported on Heatline Compact 20)
Pick your boiler brand for the overheat fault fix
Source
Information for the overheat fault 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