Our new refridgerator stopped going into the defrost mode. Like others, we had to wait for the part. Finally the tech arrived to install the part. A few days later we noticed things weren't keeping cold in the fridge, the freezer was working fine. Today when I poured a glass of sour milk I decided to take a look myself. I know how to use a nutdriver ;^) I took off the cover in the back of the freezer and just as I suspected, the vent tube that lets cold air to the lower part of the fridge was blocked. The tech replaced the foam insert... read full review »