How much does it cost to fix boiler error code 46/58?

Typical repair cost for the boiler 46/58 fault is £150-300 including labour.

46/58 High

Boiler Fault Code 46/58

Also written as 4658 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 46/58 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 control system has detected a potential communication error or a sensor fault that is preventing it from firing up correctly. (As reported on Grant Vortex)

Pick your boiler brand for the 46/58 fix

Grant 46/58 1 model

Source

Information for the 46/58 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