Joseph R West Des Moines , IA May 12, 2017 Samsung dryer ran constantly unless unplugged or door opened (no heat just spinning drum and air) Replaced main control board. It took about 20 minutes, including pulling the dryer out and squeezing my fat butt behind it to unscrew the back. It is frustrating that it is a known issue and yet so easy to repair that would cost a ton if a repair man did it. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes