BoilerFaultCodes E157 High
Boiler Fault Code E157
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E157 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 air pressure tube, which prevents it from safely managing the combustion system. (As reported on Navien LCB700)
Pick your boiler brand for the E157 fix
Source
Information for the E157 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