The heat tracing bakes the line from the solenoid to the icemaker. I think this will happen to any line is a few years. I remove the heat tracing. It is simple to do. I live in Texas and only travel north for a couple of months in the summer. I think that the chance of the line freezing is very remote, especially if the refrigerator is running.If I lived in the north, I might want the line.
In any case the leak is not much and only happens when the icemaker is filling.
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