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I have a 18 year old Jenn-Air electric oven, model W132W, series 23. Worked fine yesterday, but today no heat in any mode (bake, broil, clean). Electronic controls, display, fan all work fine, just no heat. I know the first thing to check is the resistance of the elements, but I find it hard to believe that both elements went bad at the same time. I'm thinking it's something common to both circuits. So, once I open this up and don't find any obvious problems (charred wires, loose wires, burnt limit switches, etc.), what is the best way to troubleshoot my little issue? So, my first thought is maybe one of the two limit switches (WP7403P316-60). My understanding is one is on the the bake element circuit, while the other is on both circuits. Can anyone confirm that? If one (or both) were bad, would the electronic display and controls still have power? What resistance should I see when the switch is at room temp? Is it OK to just connect the limit switch wires together (bypassing the switch) as a troubleshooting method (making sure of course that they are wrapped in electrical tape so that don't touch anything)? My next thought is the temp sensor (12001656). I understand I should see resistance of 1080-1100 at room temperature. Is this common to both elements? My last question is why the Whirlpool limit switch, item # WP7403P316-60, costs $60+!!! Some sites want $80 for it! I have bought other limit switches (for a microwave) for $10. What is so special about this Whirlpool part?? Is there an alternate part I could buy if it turns out it's bad? Thank you for any input.