Product review (5 stars): Why do you need to change this?
Well it's a fan... If it's working it sucks air and moves the air over the metal cooling system in the back end of the refrigerator, if it's not working correctly it's hard to acchive the desired cooling levels selected... Items in the refrigerator may freeze and ice cream in the freezer may be more moist than usual.

Take the lower back panel off of the unit and see the air intake, clean the fuzz off it from the cats and dust.  The fan, is it moving?  No? Order this... It's the easiest way to try to fix without knowing a parts diagram... Two plugs unhook and snap into place, fan slides into assembly... Kinda easy assuming you have a tool to get the panel off.