i13 Low

Boiler Fault Code i13

Also written as I13 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code i13 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 is not an error code, but rather a live status display showing the current temperature of the internal water store inside your boiler. (As reported on Worcester Bosch Greenstar Heatslave II)

Pick your boiler brand for the i13 fix

Worcester Bosch i13 1 model

Source

Information for the i13 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