Hello I am here to assist you.
This may be a flame sensor issue.
The flame sensor rod is a small thin steel rod that is straight or L shaped and is usually located near the pilot igniter or in the path of the burner jets.
Is that something I can fix?
Locate it, remove it, and clean it with a piece of emery cloth or sandpaper very very good.
Replace it when finsihed.
Please hit ACCEPT if you are satisfied with this answer. Bonuses and positive feedback are very much appreciated!
The main burners ignite. Is the sensor not detecting the burn?
That is correct.
Great, I will try this tonight when I get home from work, thank you for your help.
You are welcome.
I wish you success.