How much does it cost to fix boiler error code H.02.70?

Typical repair cost for the boiler H.02.70 fault is £150-300 including labour.

H.02.70 High

Boiler Fault Code H.02.70

Also written as H0270 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code H.02.70 appears across 1 boiler brand and 5 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 trouble communicating with an external heat recovery system or sensor, causing it to pause operation until it can confirm everything is running correctly. (As reported on Baxi 600 Combi 2)

Pick your boiler brand for the H.02.70 fix

Baxi H.02.70 5 models

Source

Information for the H.02.70 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