I have a top freezer fridge, and I keep getting a piece of ice or water that forms on the top shelf in the fridge. It is directy under the light and fan assy. This assembly looks to be sealed from the freezer compartment with a reflecive tape. This light assy is connected to the freezer control unit in the back of the freezer. If you open both doors, so the light is on, you can see a little light coming into the freezer box from the fridge. I don't know if colder air is coming in from the freezer and condensation is forming in the fridge, or if there is a drip tube or vent in the fridge control assy, and it is dripping onto the tray. It is always in the exact same spot? Thanks.