Arvie M Hampton , KY November 19, 2023 Appliance: LG Refrigerator LMX21981ST Lg Refrigerator Lmx21981st / Astclga: The frig is cooling but would not go below 40 degrees. The freezer was normal. How to replace Power Control Board (Assembly). Replaced the thermostat and control board Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes