After installing the oven in the wall, saw that the locking mechanism was engaged. After finding a response on line how to cycle the oven clean to get the lock to open, attempted  this and the oven greats were stripped while trying to unlock. Had a GE service call placed and the tech came out and had to order the locking mechanism. After a week, the part arrived and was installed. Oven works fine now. I like the features. Never owned a wall oven before. Time will tell if this was a good investment or not.