[SIZE=4]After 30 hours without power the following problem started with my GE Monogram Refrigerator model ZIS 48D. [FONT="]This high-end 48 inch refrigerator is about 16 years old and has always worked perfectly! Now, ice keeps forming at the very top of the freezer compartment directly above the ice maker at the joint with the ceiling panel and also inside the cold air vent at the top front of the freezer compartment. This ice forms after a defrost cycle when water migrates down through the top of the freezer and then freezes into icicles. The problem must be that the evaporator drain line directly above the freezer compartment is stopped up and most likely frozen, (I can’t see the drain line without taking the top of the freezer apart–big job). A sheet of ice also forms in the bottom of the large ice storage bin. That causes a problem with dispensing ice as the auger in the storage bin gets locked up with frozen water that has dripped into the bin. The large ice bin is also catching water coming down from the top of the freezer compartment. The ice maker works perfectly and the temperature on both sides of the refrigerator is perfect with both controls set at 6.5.
The solution is to defrost the freezer section, (first disconnect the power breaker). Carefully use a hair dryer and direct it at the top of the freezer compartment. Don’t let water run into the hair dryer as that is a safety issue–electrocution! Heat the top metal panel in the freezer and also point the dryer into the air outlet in front in the top panel. Lift up and pull out to remove the large top front refrigerator equipment panel that runs the width of the refrigerator and watch for water to flow into the small tray directly under the compressor on the right side of the refrigerator. Water must start to fill that tray otherwise the drain line is still frozen and ice will continue to form at the top of the freezer. Believe it or not, the evaporator drain line flows "down" into the tray under the compressor. The drain line is a few inches above the top panel in the freezer. It is connected to a drain pan under the evaporator. Also, it’s a good idea to empty the water in the tray under the compressor with a turkey baster. Water will normally evaporate from this tray but after this procedure a large amount of water will be found in the tray–best to remove it. Also, vacuum out the dust in the top compartment area while you have the front panel removed–good maintenance. There is nothing, (no equipment or drain pans) behind the panel at the very bottom of this refrigerator. This was a mysterious problem with a relatively simple fix 
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