Remove the door from the oven and put it on a flat surface with the door handle facing down. Remove the screws holding the inner liner and remove the liner. You do not need any glue. You'll see how the door seal mounts after you remove the liner.
- The part number for the door seal is AP4087457
Here are the breakdown diagrams and Replacement parts for JENN-AIR W121 | AppliancePartsPros.com