Robert G Connoquenessing , PA May 18, 2019 Appliance: Model 10110738 Broken mullion I removed the old mullion with a phillips screwdriver and replaced it with the same tool. The whole process took less than 15 minutes. It was a very simple DIY project. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes