Hello, my neighbor gave me his old refrigerator because he did not feel like trying to repair it. Upon receiving it, it wasn't blowing cold air. I replaced the start relay and condenser (which was badly burnt) and rhe compressor kicked on fine and it started to blow cold air. The control board keeps flashing the number "4" on the fresh food side and upon googling it this usually indicated a bad damper. I took the old damper out and it was stuck in the open position. I recieved the new damper today and installed it and it's still flashing "4" and now the brand new damper doesn't open at all. Does anyone have any idea what could be the problem? Could it be the control board or maybe something else? Thank you for your help.