How much does it cost to fix boiler error code 170W?

Typical repair cost for the boiler 170W fault is £120-250 including labour.

170W High

Boiler Fault Code 170W

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 170W 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 is experiencing a problem with its internal electrical supply or energy usage, which is preventing it from running safely. (As reported on Main Combi 24)

Pick your boiler brand for the 170W fix

Main 170W 1 model

Source

Information for the 170W 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