I have a KitchenAide kssc36qms01 built in side by side refrigerator. All of a sudden the Refrigerator side will not cool. The freezer side only cools at the bottom and not the top. The ice maker does not work which is on the top of the freezer side. The lights on work. The control display numbers on the top of the refrigerator side lights up and then turns off every second. There is a electronic beep that comes from the top of the unit where the coils are the beeps every second in time with the display turning on and off. Where should I start to check and replace parts?