6.4.1 Flame control High

Boiler Fault Code 6.4.1 Flame control

Also written as 641FLAMECONTROL — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 6.4.1 Flame control appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has failed to ignite or lost its flame during operation, and has now shut itself down for safety reasons. (As reported on Remeha Quinta 30)

Pick your boiler brand for the 6.4.1 Flame control fix

Remeha 6.4.1 Flame control 2 models

Source

Information for the 6.4.1 Flame control 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