How much does it cost to fix boiler error code FLAME ON BEFORE GV ON?

Typical repair cost for the boiler FLAME ON BEFORE GV ON fault is £150-350 including labour.

FLAME ON BEFORE GV ON Emergency

Boiler Fault Code FLAME ON BEFORE GV ON

Also written as FLAMEONBEFOREGVON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code FLAME ON BEFORE GV ON 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 detected a flame inside the unit when it shouldn't be there, which indicates a potential safety issue and has caused the system to lock out to protect your home. (As reported on Ideal Vogue Combi)

Pick your boiler brand for the FLAME ON BEFORE GV ON fix

Ideal FLAME ON BEFORE GV ON 2 models

Source

Information for the FLAME ON BEFORE GV 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 7 July 2026