Product review (5 stars): Whirlpool IM Fix Kit perfect solution to ice maker woes
Whirlpool Part Number 4378431: IM FIX KIT was exactly the part I needed to fix my ice maker.  The original part that was provided allowed the water to freeze in the fitting that came through the back of my refrigerator before it made it into the ice maker.  This made the whole machine useless.  This repair part fixed the issue by sliding over the original fitting covering up the area that would freeze, and allowing the water to be delivered to the ice maker prior to freezing.  The part is made long to allow for modification to fit your needs, and that was key to making it work.  Thank you for this part!