Neither element fires up, I have checked and did not find any tripped breaker how do I test to see if thermal switch is bad or is it possible for all
thermal fuses to be tripped? Or what else can cause this problem?
You will want to test the thermal fuse for continuity. If there is no continuity then the thermal fuse is bad. You can also test at the control board with the unit set to bake, check from Bake to L2 and if there is 240 vac at this point then the control board is faulty.