r2 Low

Boiler Fault Code r2

Also written as R2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code r2 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 is currently in the middle of a internal software reset process and is not experiencing a fault. (As reported on Worcester Bosch Greenstar 25HE)

Pick your boiler brand for the r2 fix

Worcester Bosch r2 1 model

Source

Information for the r2 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 31 August 2026