Surface element control switch for the large surface element. If the surface element is not heating the element can be tested to determine if it is defective. If not, the switch is likely causing the problem.
Stove top coil surface heating element, 8 inch. If the element does not heat either it or the control switch is defective. The coil can be tested to determine if it is at fault.
Range/stove surface element (6-inch). If the surface element won't heat, either the surface element or the surface element switch may be defective. To determine if the surface element is defective, use a multimeter to test it for continuity.