Product review (5 stars): Great replacement thermostat
I had to replace the Thermostat on my Frigidaire refrigerator and this worked perfect.  Very easy to change, just cut the two wires of the old thermostat and use the included crimps to attach the new one.  The heat shrink tubing is awfully big and does not shrink to make a tight fit by any stretch, so not sure why they are using such large tubing when they easily could of used something much smaller that would of fit significantly better.  But the device itself works great and is easy to change.  If your system is not defrosting, there is a high likelihood it is the thermostat that is causing it.  It can only be one of three things (thermostat, heating element or the timer/control boards depending on what type of system you have).  As this product is so inexpensive why not try it first before calling for a repairman.  Save yourself cost and headache!