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

Typical repair cost for the boiler 6 / H fault is £120-250 including labour.

6 / H High

Boiler Fault Code 6 / H

Also written as 6H — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 6 / H 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 for a split second before immediately shutting itself off because it cannot detect the flame. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 6 / H fix

Ideal 6 / H 1 model

Source

Information for the 6 / H 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