Anthony T Covington , GA March 21, 2015 Appliance: LG Electric Range LRE30757ST Lg Range Lre30757st / Fstllga: Not reaching correct temperature. How to replace Thermistor. I ordered a thermometer and bake element for replacement. I found video's on line and it was easier than I thought it was going to be after I watched the video's. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours