Product review (5 stars): SAVED ME HUNDREDS ON REPAIR
After going through a process of elimination to find the culprit that was causing my refrigerator problems, I came to the conclusion that I either needed a defrost thermostat or a defrost timer.  I decided to purchase both from Amazon for less than $30 total even though I was 90% certain it was this item (defrost thermostat).  Anyways, the installation was easy with the help of my refrigerator's parts diagram I found on the web.

I saved literally hundreds fixing my 5 year old Frigidaire myself and it should be good-to-go for at least another 5 more years!  I'll keep it at 'medium' temperature instead of super cold and hopefully it will not die out so quickly this time around.