Amana ISO 9001 freezer on bottom: I noticed that the food in the top of the frig was not as cold as it should be. I looked in the freezer and found the back wall iced over. I defrosted the back wall with my hair dryer. It has not refrosted but the frig part is not cooling very well. I read somewhere to pour very hot water down the vented part on the upper part, left corner. I did and I heard ice breaking up. Now the top has some cool air coming in but not enough.