How much does it cost to fix boiler error code 528?

Typical repair cost for the boiler 528 fault is £120-250 including labour.

528 High

Boiler Fault Code 528

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 528 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 system has been configured with the wrong internal settings and cannot operate correctly because it doesn't recognize which model it is supposed to be. (As reported on Viessmann Vitodens 100-W B1GA)

Pick your boiler brand for the 528 fix

Viessmann 528 1 model

Source

Information for the 528 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