BoilerFaultCodes SR Low
Boiler Fault Code SR
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code SR appears across 1 boiler brand and 14 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is simply letting you know that its annual routine service is now due to ensure it continues running safely and efficiently. (As reported on Alpha E-Tec, E-Tec Plus, Evoke)
Pick your boiler brand for the SR fix
Source
Information for the SR 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