Nora Z Los Angeles , CA October 23, 2022 Appliance: KitchenAid Refrigerator KBFA25ERSS00 Kitchenaid Refrigerator Kbfa25erss00: Needed to replace a clunky "mullion" hinge on our KitchenAid fridge. How to replace Refrigerator Mullion Rail. The left hand side of our fridge was hard to close no matter what we did and it was just getting worse and worse. Once I figured out what the part was, we replaced the mullion hinge piece and the pivot block just to be sure. The only tool we needed was a nut driver - I was not sure we had one but ended up using a screwdriver with an interchangeable head, without the head piece in, it's basically a nut driver the exact size of this screw. I cannot believe we waited as long as we did to take care of this problem. The fix was so simple I was annoyed we have been living with this being an issue for so long when the solution was so simple. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes