Thanks for the question .
when the dryer goes on do you the gas valve ,click or clunk 30-45 seconds after dryer starts
If you can see under the drum area where the burner is can you SEE the ignitor glowing.
here is a link to you parts break down.
The ignitor is item #10
if the ignitor does glow try pulling one wire off flame sensor item #22 which is on left side of combustion cone.
this wire will be live so don`t touch it or touch it to ground.
If flame lights when wire from flame sensor you have a bad sensor.
If the ignitor was not was not glowing then pulling wire would not do anything.
Can you check voltage at the ignitor when dryer is on ?
with out a meter we are at an impass.
We will need to be able to check voltage to go any further.
or you would need to call for service.
Im in EST almost witching hour HAHA
If you want we can go at it again tommorrow. or I can OPT out and some one else can try to assist you later .
I should jump on around 5p.m. EST tommorow but if you, dont want to wait and like some one else to help you that is ok you need a dryer I understand .