A little under a year ago, the oven/range stopped heating. My wife was in the middle of cooking supper and using both the range and oven when both stopped heating. The display/speed bake fan/timer all still worked - in fact, everything appears to be working, but nothing will heat up at all. I read some posts on here to try to diagnose the problem, and after a couple of days researching was going to use a multimeter for the first time to try to diagnose. I verified the voltage at the outlet, and then plugged it in and turned on one of the burners to check continuity, but it worked! Everything worked as if nothing had happened and continued to do so until last night when it did the same thing. This morning it is working again. This time it was left plugged in and just rechecked it this morning to find it working. What could be causing this? Thanks!