My cooling fan (not the convect fan) will come on when the unit reaches about 200 degrees after the range is put into the "bake" mode. The cooling fan will remain on during baking and will continue to run for a while after the range is turned off. The cooling fan previously came on only when the unit was in "self clean" mode. After reading through some of the threads at your forum, I saw where one person fixed their range with the downdraft relay board 12001694 (AP4010046 $93.31). Another appears to have fixed the same problem with the main relay board 12001691 (AP4008573 $245.53). What part do you recommend for this problem? If I buy the less expensive part and it doesn't fix the problem can I return it and buy the higher priced one?