Called the local repair shop. They said it could be the main circuit board which would cost $550 to replace the entire electronic panel. Went online, found theis site. Found several people who had the same problem. Followed their instructions and checked the temperature fuse - it was bad. Ordered the part through AppliancePartsPro for about $40. Took about 20 minutes to change out the fuse and put oven back together. All is working fine. thanks for the advice!