BoilerFaultCodes i2 Low
Boiler Fault Code i2
Also written as I2 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code i2 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 This code is simply a record showing the last technical error your boiler experienced; it is not currently reporting an active fault. (As reported on Worcester Bosch Greenstar Heatslave II)
Pick your boiler brand for the i2 fix
Source
Information for the i2 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