Joseph H Covington , LA March 13, 2018 Appliance: General Electric Refrigerator PSI23SGMDFBS Ge Refrigerator Psi23sgmdfbs: Refrigerator not cooling. How to replace Refrigerator Main Control Board. Replaced the control board and all is well. Easy repair from watching the video and the part arrived promptly. VERY GOOD SERVICE. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes