oven in range would not stay lit or achieve temperature

I slide range away from wall, unplugged the electric. Lifted door off the hinges for easy access. The broiler drawer also comes right out. Removed racks and then took out bottom panel. The ignitor is mounted with two hex nut screws. They came out with a phillips head screwdriver. The plug connector is accessable from the rear or the range, there was nothing else to take off. I simply unplugged the connection, pulled the wire through the insulation, screwed on the new ignitor and pushed the plug and wire back through the insulation and plugged it in. The job took less than 25 minutes and that time included cleaning behind, under and inside the range! Oven lit first time it was turned on and works as good as new.