Product review (5 stars): Fits Kenmore Top Freezer Refrigerator perfectly! Instructions are included
I purchased a Kenmore 18.2 cu ft Refrigerator (Top Freezer) for the garage and needed the freezer to work correctly.  This kit fits pretty much all Frigidaire/Kenmore Top Freezer Refrigerators 2001 or later.  Do a quick google of "how to install garage refrigerator heater kit", and you will see a result with step by step instructions with pictures.  It didn't take me more than 5 minutes, and it works.
This was a cheaper option than buying a Gladiator fridge for the garage.  Cost of refrigerator (18.2 cu ft) at Sears and this kit: $405 plus tax.  Gladiator refrigerator (19.0 cu ft): $1080 plus tax.

After 12 hours of the installation, the freezer and refrigerator are working at correct temps.  Outside temp has been 32/15 (day/night), and now the freezer cycles between 3 and 8 degrees, with the refrigerator staying at 35 degrees.  Before, the freezer cycled at 29-35 degrees.  No more freezer burnt meat.