James M Burlington , NJ March 12, 2014 Appliance: Whirlpool Built-In Oven/Mw, Electric GMC305PDS5 Whirlpool Oven Gmc305pds5: Interior glass in oven cracked. How to replace Rear Oven Door Glass. I removed the oven door, disassembled it, removed the cracked glass, replaced it with the new glass, reassembled the door, and re-attached it to the oven. Approximately 45 minutes of work. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes