How much does it cost to fix boiler error code H03.01?

Typical repair cost for the boiler H03.01 fault is £150-300 including labour.

H03.01 High

Boiler Fault Code H03.01

Also written as H0301 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code H03.01 appears across 1 boiler brand and 1 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 computer is having trouble communicating with one of its internal control modules, causing the system to stop working as a precaution. (As reported on Remeha Quinta Ace 30)

Pick your boiler brand for the H03.01 fix

Remeha H03.01 1 model

Source

Information for the H03.01 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