Im repairing my refrogerator a Fridair side by side Ive replaced the defrost t-stat,and adabtive defrost timer and still on the 3rd day frost build up as if NO defrost,the heater ohms out OK,can/will some one please HELP!!I am a HVAC contractor that started out in the appliance field and YES I would like to get back into the appliance repair trade ive gotten a schematic of this GREAT SITE ,can some one please help