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

Typical repair cost for the boiler 6A fault is £120-450 including labour.

6A High

Boiler Fault Code 6A

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 6A appears across 2 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is failing to light the gas flame properly, meaning it cannot heat your water or radiators. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 6A fix

Ideal 6A 1 model Worcester Bosch 6A 5 models

Source

Information for the 6A 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