Oven bake heating element with push-on wire terminals. If the oven won't heat, the bake element may have burned out. Often, if the bake element has burned out, it will be visibly damaged.
Range/stove surface element control switch repair kit. Compatible with a variety of models. The surface element switch sends voltage to the surface element coil. If the surface element is not heating, first test the surface element. If the element is not defective, the switch is likely at fault.