I have a Frigidaire electric Single Convection Oven, in-cabinet mount, model PLEB30S8ACA. It randomly stops baking mid-cycle. Also, the beeper starts going off at random times. It had this problem before, and the control panel was replaced for around $300. This time around I can do the repair myself, but I want to know a) would I need to replace the whole control panel, or just some parts of it? And b) the original, and this replacement each only lasted about 3 years. Is this typical, or is it a frequent problem for which Frigidaire offers some acknowledgment and/or redress? Thanks.