Flame loss: gas furnace codes by brand

The burner lit but the flame went out or became unstable during operation.

Brand	Code	Meaning	What you can do
Carrier	14.2	Flame lost 3 times after 70 seconds of heating	Safe checks first, then a pro
Carrier	14.3	Lockout after 7 flame losses in one heat request	Safe checks first, then a pro
Carrier	34.2	Flame lost before the heating blower started	Safe checks first, then a pro
Carrier	34.3	Flame lost after the heating blower started	Safe checks first, then a pro
Carrier	34.4	Flame lost at reduced inducer pressure or in Self Healing mode	Safe checks first, then a pro
Carrier	34.5	Low heat flame lost before the blower started	Safe checks first, then a pro
Carrier	34.6	Low heat flame lost after the blower started	Safe checks first, then a pro
Carrier	34.7	High heat flame lost before the blower started	Safe checks first, then a pro
Carrier	34.8	High heat flame lost after the blower started	Safe checks first, then a pro
Goodman	E6	Weak flame signal	Call a pro
Goodman	EE6	Weak flame signal	Call a pro
Goodman	amber light flashing rapidly	Weak flame signal	Call a pro
Goodman	7 red flashes	Flame loss or ignition failure (depends on model)	Depends on your model
Goodman	8 red flashes	Ignition failure or flame loss (depends on model)	Depends on your model