How much does it cost to fix boiler error code H 2?

Typical repair cost for the boiler H 2 fault is £120-220 including labour.

H 2 High

Boiler Fault Code H 2

Also written as H2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code H 2 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal sensor that monitors the water temperature returning to the unit is malfunctioning, which is causing the system to stop working as a safety precaution. (As reported on Ideal Isar HE)

Pick your boiler brand for the H 2 fix

Ideal H 2 3 models

Source

Information for the H 2 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