BoilerFaultCodes 52.0 High
Boiler Fault Code 52.0
Also written as 520 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 52.0 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 problem with the burner's ability to ignite or stay lit, causing it to stop heating. (As reported on Grant Vortex)
Pick your boiler brand for the 52.0 fix
Source
Information for the 52.0 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