Thermostat

The wife tried to use the Self Cleaning option on the oven and it just stopped during the process. I found the thermal fuse had opened and I replaced it. Now the lower oven works fine, the upper unit does not heat up (bake). The trouble shooting guide recommends to replace the Oven Shutdown Thermal Fuse. Where exactly is this component? Do I have to pull the entire unit out of the cabinet to replace?