DogDog014 formulated on Friday :
If its not igniting, it is either no gas flow or the igniter is failing to ignite it. Have you tried lighting it with a match?
The thermocouple failing would be indicated by it being able to be lit, but after counting to ten before releasing, it then fails to stay lit. Either thermocouple failure, or misaligned thermocouple, or gas solenoid failed.