Dana H Crossville , TN February 11, 2024 Appliance: Whirlpool Electric Oven RBS245PDB4 Whirlpool Oven Rbs245pdb4: The inner glass was cracked. How to replace Glass, Inner. I took the door off of the oven, and then took the door apart. You have to pay attention to what order you take everything apart, but a pretty simple task. The glass I ordered was an exact fit on an older oven door. It wouldn't have taken as long but I like to double check everything. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours