How much does it cost to fix boiler error code 359?

Typical repair cost for the boiler 359 fault is £150-250 including labour.

359 High

Boiler Fault Code 359

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 359 appears across 2 boiler brands and 6 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 that the water coming out of the system is reaching an unsafe temperature, so it has shut down to prevent scalding or damage. (As reported on Worcester Bosch Greenstar 12i System)

Pick your boiler brand for the 359 fix

Viessmann 359 1 model Worcester Bosch 359 5 models

Source

Information for the 359 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