14.3 Emergency

Boiler Fault Code 14.3

Also written as 143 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 14.3 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 has detected an issue with the internal gas pressure regulation, meaning it cannot safely control the size of the flame required to heat your home. (As reported on Glow-worm EnergySaver)

Pick your boiler brand for the 14.3 fix

Glow-worm 14.3 1 model

Source

Information for the 14.3 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 7 July 2026