Simon B Monsey , NY September 23, 2019 Appliance: KitchenAid Refrigerator KSSS48QDX05 Kitchenaid Refrigerator Ksss48qdx05: Bad thermostat. How to replace Refrigerator Thermostat Barrier. Very easy when you get the right part 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes