How much does it cost to fix boiler error code Flame Failure (Red Light) ON?

Typical repair cost for the boiler Flame Failure (Red Light) ON fault is £100-280 including labour.

Flame Failure (Red Light) ON High

Boiler Fault Code Flame Failure (Red Light) ON

Also written as FLAMEFAILUREREDLIGHTON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Flame Failure (Red Light) ON appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has tried to ignite but was unable to stay lit, meaning your heating and hot water will not work until it is reset or repaired. (As reported on Baxi Combi 80e)

Pick your boiler brand for the Flame Failure (Red Light) ON fix

Baxi Flame Failure (Red Light) ON 3 models

Source

Information for the Flame Failure (Red Light) ON 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