An icemaker is like an appliance inside an appliance. In many cases the icemaker is a complete and separate unit that is simply added onto a standard refrigerator freezer as upgrade feature. An icemaker's operation is dependent upon the freezer only to provide the cold and the electricity; everything else is a function of the ice maker itself.
If your ice maker or portable ice maker is malfunctioning, take a look at our troubleshooting chart to isolate the problem. From there we'll guide you in how to test and repair an ice maker.