Product review (1 stars): worked for a few months - DO NOT BUY
It fixed the problem with my freezer thawing and then freezing again.  I have to keep the thermostat all the way down now so the stuff in the fridge doesn't freeze.  The problem got worse and worse so now I have to buy a new one from a reputable company.  Seller did not offer me anything on a replacement. He just said it was out of warranty.  DO NOT BUY ANYTHING FROM THIS SELLER!