How much does it cost to fix boiler error code I.57?

Typical repair cost for the boiler I.57 fault is £0-120 including labour.

I.57 High

Boiler Fault Code I.57

Also written as I57 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code I.57 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has received an external signal to stop running, likely from a smart thermostat, heat pump interface, or safety switch that is temporarily preventing it from firing up. (As reported on Viessmann Vitodens 200-W B2KF Combi)

Pick your boiler brand for the I.57 fix

Viessmann I.57 4 models

Source

Information for the I.57 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