Jesse J Greensboro , NC December 09, 2016 Appliance: KitchenAid Refrigerator KSRA22FKSS00 Kitchenaid Refrigerator Ksra22fkss00: High temp alarm in refrigerator section ice build up around air diffuser in refrigerator and ice build up in bottom of freezer section and freezer drain. How to replace Thermistor. Replaced air diffuser and freezer thermistor. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes