BoilerFaultCodes 578 High
Boiler Fault Code 578
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 578 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 a faulty sensor that monitors temperatures, meaning it cannot safely control its heat output and has shut down to protect itself. (As reported on Worcester Bosch 1000)
Pick your boiler brand for the 578 fix
Source
Information for the 578 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 27 April 2026