No Bake Oven

Oven was taking long to reach baking temp, sometimes only reaching partial temp (did not observe what was going on), now does not heat up at all. Ignitor fires and stays on, but gas does not come on (maybe slight gas odor). Broiler works fine and that ignitor shares the same gas valve as bake ignitor. Do I need to check for voltage at valve and/or that ignitor is hot enough (is that the same thing?) or do I have a no-brainer faulty/weak bake ignitor? Does it make sense to try to swap the bake/broiler ignitors (the appear to be the same) to see if bake then works? Please help diagnose…thanks!