Ignition failure: gas furnace codes by brand

The appliance tried to light the burner and did not detect a flame.

Brand	Code	Meaning	What you can do
Carrier	14	Ignition lockout after repeated failed lighting attempts	Safe checks first, then a pro
Carrier	34	Flame not proved during ignition	Safe checks first, then a pro
Carrier	14.1	Ignition lockout after repeated failed lighting attempts	Safe checks first, then a pro
Carrier	34.1	Ignition fault, burners did not light in 4 trials	Safe checks first, then a pro
Goodman	E0	Lockout after three failed ignition attempts	Safe checks first, then a pro
Goodman	E7	Igniter circuit problem or poor ground	Call a pro
Goodman	EE0	Lockout after three failed ignition attempts	Safe checks first, then a pro
Goodman	EE7	Igniter circuit problem	Call a pro
Goodman	EEL	Igniter circuit problem	Call a pro
Goodman	EEn	Igniter open	Call a pro
Goodman	1 red flash	Ignition failure or gas valve fault (depends on model)	Safe checks first, then 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
Goodman	11 red flashes	Ignition failure or overheat (depends on model)	Call a pro
Goodman	12 red flashes	Flue or venting fault / ignition failure (depends on model)	Call a pro