I replaced the main control board (under the fridge) and the panel control board (the touch control on the front door). Previously, a repairman came and only replaced the main control board, which didn't solve the problem. After looking at the comments for the appropriate parts on this website, I learned that you need to replace BOTH parts. I did so, and it worked perfectly. In fact, I had purchased a new fridge, but it was a fraction of an inch too wide, so I ordered these parts overnight before I went and found a different fridge. So as far as I'm concerned Appliance Parts Pros saved me $1000.