Product review (5 stars): Did it myself and saved!
My refrigerator kept icing up and the fan would stop.  I could thaw everything out and it would run again but that fix lasted only a few days. With help from online do it yourself sites, I decided to replace the thermostat first, as it was the least expensive of suspected parts o replace.  As it turned out, I also needed a timer, but these parts are inexpensive and arrive within a few days from ordering.  I saved myself maybe $1,000 by not having to replace the refrigerator and it works fine now.