How much does it cost to fix boiler error code 164?

Typical repair cost for the boiler 164 fault is £120-240 including labour.

164 High

Boiler Fault Code 164

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 164 appears across 1 boiler brand and 26 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 a problem with the sensor or switch that monitors water movement, preventing the system from heating up properly. (As reported on Baxi EcoBlue)

Pick your boiler brand for the 164 fix

Baxi 164 26 models

Source

Information for the 164 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 27 April 2026