Suburban Furnace SF-30F year 2006

I opened again and there is great spark. I measured per the manual and put the igniter exactly where it is supposed to be. I left the pipe to burner off and ran it and propane Valve opened and sent gas into air. I checked the temperature sensor and bypassed it and no change. I tested DC voltage and it is good. So if there is spark and that means sail switch is fine then the only thing I have left is the control board?
Doesn't make sense that I have spark and gas but no flame. I checked gas tube to burner and I can blow air through it.