I don't know the answer to your question, but my probe sits on top of a keg, so very near the top of the freezer and it doesn't cut on every time you open the lid. It only cuts on for a couple minutes every few hours. Cold air sinks, so it doesn't really rush out much when you open the lid.
Elkins Creek Brewing Company
Secondary: Bavarian Hefewizen (extract)
Bottle: Blue Moon clone, Sam Adams Boston Ale Clone, Christmas Chocolate Stout (All Grain)
Keg: AHS West Coast Pale Ale, BierMuncher's Centennial Blonde (All Grain)