BoilerFaultCodes 30° neon flashing High
Boiler Fault Code 30° neon flashing
Also written as 30NEONFLASHING — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 30° neon flashing appears across 1 boiler brand and 3 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 an issue with the sensor that monitors the water temperature, causing the system to shut down as a safety precaution. (As reported on Potterton Performa 24)
Pick your boiler brand for the 30° neon flashing fix
Source
Information for the 30° neon flashing 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