BoilerFaultCodes 387 High
Boiler Fault Code 387
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 387 appears across 2 boiler brands 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 is struggling to push out waste gases because it cannot correctly measure the airflow inside the flue system. (As reported on ECA FELiS FL 50 HM)
Pick your boiler brand for the 387 fix
Source
Information for the 387 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