Mark U Spring Hill , FL January 01, 2018 Appliance: Model 752720521121 Frozen coil on refridgerator Removed back cover in refrigerator to find the coil frozen. I ordered the part overnight and I replaced the defrost sensor, now all is well!! Fast and easy thanks to AppliancesPartsPros.com!! 23 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes