How much does it cost to fix boiler error code H.01.00?

Typical repair cost for the boiler H.01.00 fault is £120-250 including labour.

H.01.00 High

Boiler Fault Code H.01.00

Also written as H0100 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code H.01.00 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having a temporary communication hiccup between its internal electronic parts, which has caused it to pause operation as a precaution. (As reported on Baxi Assure System)

Pick your boiler brand for the H.01.00 fix

Baxi H.01.00 8 models

Source

Information for the H.01.00 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