Douglas W Miami , FL August 10, 2020 Appliance: KitchenAid Side By Side Refrigerator KSRA25FKSS00 Kitchenaid Refrigerator Ksra25fkss00: Freezer too cold, fridge too warm and was almost always running. How to replace Thermistor. Replaced the defrost thermostat and the freezer and fridge thermistors and now everything working like it should. Wasn't sure which of the three was faulty but since the parts were inexpensive it was easier to just replace all three at one time. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes