How much does it cost to fix boiler error code H.01 – .05?

Typical repair cost for the boiler H.01 – .05 fault is £120-280 including labour.

H.01 – .05 High

Boiler Fault Code H.01 – .05

Also written as H0105 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code H.01 – .05 appears across 1 boiler brand and 24 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 is heating up too quickly or isn't circulating properly through the system. (As reported on Baxi 200 / 400 Combi)

Pick your boiler brand for the H.01 – .05 fix

Baxi H.01 – .05 24 models

Source

Information for the H.01 – .05 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