Adam K Everett , WA October 08, 2023 Appliance: Whirlpool Refrigerator GB2SHTXTB00 Whirlpool Refrigerator Gb2shtxtb00: Ice cream in the freezer was hard as a rock even after setting the freezer to the warmest setting. How to replace Thermistor Kit. I originally replaced the thermistor in the freezer. That fixed my problem for less than a week. So I decided to replace both thermistors & the electronic control panel. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes