Refrigerator Intermittently Heats into the 80's &...

So my mother in law closes the fridge one night and the next day wife finds temperature into the 80's in the morning having spoiled everything - WHAT! (did she do). So I looked a the manual to find this fridge can actually heat in the bottom drawer - this is a REFRIGERATOR who in their right mind would put a heating element in a REFRIGERATOR - whatever. So I turn the dumb thing off, hit turbo cool, close the door and the little organe light by the 3.0lbs stays lit - wife said she thinks it has always been lit for the time we have had it 3 or so year. It cools down to normal - light is still lit. 2 weeks after mother in law has left and all has been quiet - I closed the fridge one night and opened the door the next morning to a reading of 97 degrees in the fridge everything spoiled again!!!!!!! What is the problem - how to fix it &/or disable heating element? P.S. sorry mom in law for thinking you did it.