Kurt R Denver , CO June 29, 2015 Appliance: KitchenAid 30" Built-In Electric Double Oven Thermal Convection Lower Microwave Convection KEHC309JSS08 Kitchenaid Oven Kehc309jss08: Broken torsion springs on kitchenaid superba microwave oven door. How to replace Microwave Door Torsion Spring (Lh). Ordered the correct parts, which arrived in 2 days. Took a couple of hours as this sucker is a huge pain, but some offered tips did help. Second time these have broken on this oven.... 18 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours