BoilerFaultCodes Fault 13 / 158 High
Boiler Fault Code Fault 13 / 158
Also written as FAULT13158 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Fault 13 / 158 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's computer is confused because it thinks a new component has been plugged in or a setting has changed, and it needs to be told how to work with the updated system. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the Fault 13 / 158 fix
Source
Information for the Fault 13 / 158 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