Product review (5 stars): Worked like a champ
So I pay the refrigerator repair guy 170 to fix the fan in the freezer.  A month later my coils are froze up and my fridge is not cooling.  After proper research it came down to 1 of 2 things.  Defrost timer or thermostat.  I went with defrost timer.  It was factory replacement like it said- - Took me a whole 3 minutes to pop it in.  Lo and behold my fridge is once again as good as new.  It is 6 years old.  No more paying the fridge man anything.  Do your research- the wiring on a fridge is very basic.