BoilerFaultCodes E03-888 High
Boiler Fault Code E03-888
Also written as E03888 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E03-888 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 has detected an incorrect settings or a hardware issue specifically related to how it processes liquid petroleum gas, meaning it cannot heat your home safely. (As reported on Keston K170)
Pick your boiler brand for the E03-888 fix
Source
Information for the E03-888 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