Kenneth D Boca Raton , FL March 05, 2015 Appliance: KitchenAid Refrigerator KSRS25CNSS00 Kitchenaid Refrigerator Ksrs25cnss00: Air diffuser broke. How to replace Refrigerator Temperature Sensor Thermistor. The site came up on a Google search suggesting a new air diffuser which was indeed the problem. I got a thermistor too just in case but probably want needed. Saved a fortune compared to a repair man and was able to cancel an order I had for a new unit saving over $1200+! Very happy with the whole process and videos on you tube etc. Great site! Thanks! 37 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes