Frigidaire range model #FEFLFSA, is the top element

When you say Top Element, I assume you mean the TOP OVEN ELEMENT, correct? You have bake, and broil? Bake is usually on the bottom, and broil is the top. In order to have the oven operate correctly, the top and bottom elements may come on at start, in order to do as you just said, "Preheat the oven". This will insure an even distribution of the heat in the oven box and result in better cooking expierences. I would not be alarmed or concerned if the top element came on for a short period to pre-heat in preparation for cooking. This is normal. If the top element stayed on, and did not shut off on bake after the pre-heat period, then I would say you have a control board problem. However, if it comes on and then goes out, except when you are broiling, then I would say that this is normal for your stove, and the pre-heat mode of operations. Your owners manual should advise you of this very process in the guide section to how to use the oven. I hope this helps and that all your cakes, pies, souffle's and the like are......delicious. I'm sure they are. I hope this helps and eases your concerns. Kindest regards, Slats.