Bonnie W Dyersburg , TN December 11, 2018 Appliance: Frigidaire Refrigerator LGUB2642LF8 Frigidaire Refrigerator Lgub2642lf8 / : Top ice maker would not work tray temperature always showed 52 deg. How to replace Main Power Control Board (Pcb Assembly). Replaced main control board 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes