William O Lawrenceville , GA June 13, 2022 Appliance: Maytag Refrigerator MFD2560HES Maytag Refrigerator Mfd2560hes: The refrigerator was not cooling consistently and the water lines were freezing. How to replace Thermistor Kit. I purchased a replacement damper controller and thermistor kit. After watching the installation videos on the website, I was able to replace those components and the refrigerator is cooling consistently again. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes