I first noticed the problem with my GE PSC25NSWA, when I'd see large icicles in the freezer and/or a block of ice in the ice bin. The ice seemed to have thawed to the point that the water would over-flow the ice bin. The temperature in the freezer will eventually recover and, at times, I'd find a flat, smooth layer of ice in the bin - to the point that the auger cannot operate since it's frozen solid.
I know the temperature fluctuates in the freezer, as I've also found the cubes partially melted and a good deal of water in the bin.
I don't beleive this is a ice mold filling problem or an ice mold heating problem, as I've duplicated the temperature fluctuations with no ice in the bin and the ice maker turned off. I checked the ice mold filling by testing the filling operation and there's no over-flow. Again, the icicles and over flow was the way I initially discovered the problem.
When the freezer is experiencing the problem, I notice the real-time temperature display climbs to 3 to 5 degrees. When the tempeuature recovers, the normal freezer temp displays as -1 to -2 degrees. Using an infrared temp gauge, the lower area of the freezer is very cold (well within the negative range), but the upper region of the freezer can be 30 to 37 degrees.
I'm suspecting that an intermittant fan may be the problem. When the temp in the freezer is above freezing, the fan is almost never on and won't come on when I check the fan, by depressing the freezer door switch.
Conversely, when the freezer temperature is normal, the fan in the freezer almost always comes on when I depress the door switch.
Any help would be appreciated!