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 2 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 undergoing a factory reset to restore its internal settings to their original state. (As reported on Worcester Bosch Greenstar R29 40 HE)

Pick your boiler brand for the r2 fix

Worcester Bosch r2 2 models

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 27 April 2026