How much does it cost to fix boiler error code 55427?

Typical repair cost for the boiler 55427 fault is £150-300 including labour.

55427 High

Boiler Fault Code 55427

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 55427 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 a critical internal communication fault between its main electronic brain and the control panel, causing it to shut down for safety. (As reported on Ariston HS Premium)

Pick your boiler brand for the 55427 fix

Ariston 55427 1 model

Source

Information for the 55427 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