The griddle would not heat

1st lift out the heavy steel griddle.
2nd test pilotless igniter.
3rd check the primary flame.
4th locate part # on the safety valve assy.
I never heard of the brand "Five Star" and I couldn't find any documentation for it either. An internet search finally informed me it came from the Brown Stove Works in TN. I then learned that some models were sold with GE badging (labeling) which me got to Part Select dot com's catalog where I found an image of the part I needed.
5th order the part
6th install the valve and reassemble the burner
7th test
8th put griddle back in place