How much does it cost to fix boiler error code 6H?

Typical repair cost for the boiler 6H fault is £120-350 including labour.

6H High

Boiler Fault Code 6H

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 6H 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 is lighting up but the flame goes out straight away, preventing the system from producing heat. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 6H fix

Ideal 6H 1 model

Source

Information for the 6H 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