Product review (5 stars): Kenmore/Whirlpool Fridge
Fridge was freezing up and wouldn't cool well since it wouldn't defrost.  Fan bearings were worn out causing vibration and sometimes fan wouldn't start unless you manually spun the blade.  Replaced fan and defrost thermostat.  12 year old fridge now works like new.  Orignal Whirlpool part and fan price was nearly half the local price.