How much does it cost to fix boiler error code 454?

Typical repair cost for the boiler 454 fault is £150-300 including labour.

454 High

Boiler Fault Code 454

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 454 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's computer has detected an internal configuration error that is preventing the burner from starting, meaning you currently have no heating or hot water. (As reported on Viessmann Vitodens 100-W B1GA)

Pick your boiler brand for the 454 fix

Viessmann 454 1 model

Source

Information for the 454 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