Our Frigidaire GLEF378ASD range is almost exactly 15 years old. This morning, we had a thermal runaway while baking a cake and a pan of brownies. (With sea salt caramel chips, too.)
This is the second time this happened; the previous time was about 8 months ago. The first time, there was an error code (which I no longer remember); this time, there was none; the display showed the selected bake temperature. We pulled the breaker to let things cool down.
Last time, the oven went right back to working as before, until today.
It did have one other problem: very occasionally, after turning the oven on and selecting a temperature, the display would run up to 550 F and never actually turn on the element. Resetting the temperature would make it work as usual.
A sugar-caramelization calibration test after the first runaway showed the oven was dead-on accurate, as it was before the event.
Do we need to replace just the logic board? Or is there more that I need to replace? I don’t want to have to put a $200 logic board in it and not have that be the problem, or the whole problem.