have maytag refiregerator model MSD2641KEU SERIAL # 50095244JR BOUGHT IN 2007 never any problem this first time it has broken . PROBLEM I HAVE IS REFIRGERATOR has STOP BLOWING COLD NO COLD AIR COMES OUT I HAVE THE SIDE BY SIDE REFIGERATOR THE FREEZER WORKS FINE JUST REFIREGERATOR SIDE STOP WORKING I NEED TO KNOW WHAT PART TO REPLACE . i have replace so far this part adc the part in white box located circuit board proble still there. after i melt freezer side all is good until gets frozen than i have no air flow going to refrigerator side . below is the part i replaced 
thank you for the help
[LEFT]Board, Adapt Defrost [/LEFT]
[LEFT]Part Number: AP4078743 [/LEFT]