Ken R Colorado Springs , CO October 19, 2015 Appliance: Samsung Refrigerator RB215LABP/XAA-0000 Samsung Refrigerator Rb215labp/Xaa-0000 / : It was not cooling though the display indicated low temps. How to replace Refrigerator Main Control Board Assembly. By unplugging and replugging it (essentially rebooting), the display immediately showed the true (high) temps and began cooling down. This worked for about a week, rebooting it every couple days. Then it just stopped cooling altogether. Online videos strongly suggested the main control board, and showed how to replace it. I ordered one from AppliancePartsPros.com and it arrived in 4 1/2 days. It took about 20 minutes to install and within 2 hrs everything was back to normal. First time in a couple months I've had hard ice cream! 25 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes