How much does it cost to fix boiler error code 384?

Typical repair cost for the boiler 384 fault is £150-300 including labour.

384 High

Boiler Fault Code 384

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 384 appears across 4 boiler brands and 17 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 its internal electrical communication or lighting system, which is preventing it from operating correctly. (As reported on ECA FELiS FL 50 HM)

Pick your boiler brand for the 384 fix

Baxi 384 11 models ECA 384 1 model Main 384 2 models Potterton 384 3 models

Source

Information for the 384 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