Fan Noise from Freezer

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[SIZE=3]I have a Samsung Refrigerator Model: RM255LASH[/SIZE]
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[SIZE=3]There is a loud fan noise coming from the freezer side inback of the Ice maker. It stops when youopen either the main freezer door or refrigerator door. The freezer does not seem to be freezing likenormal. Food at the top was starting toget soft and the water in the ice tray is not freezing completely. The noise is loudest when freezer door isopen and you hold the door button in. Ican hear it in back of ice maker. Waslooking at the following part: [/SIZE]Motor PartNumber: AP4136543. not sure if this what Ineed? If so do I access it from insidethe refrigerator in back of Ice maker assembly?
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