If you move the tip down into the clip where it belongs, that will be about an inch. Try that and see how it goes. If need be you can slide the clip with the thermistor down lower but try a bit at a time and give the refrigerator time to adjust. It's best to have a small thermometer in the refrigerator like this to keep a close eye on the temp:
Cooper-Atkins 330-0-1 Refrigerator/ Freezer Vertical Glass Tube Thermometer https://www.amazon.com/dp/B0041TJCB4..._gOU4xbF9MP6Y9
(I think you can find them cheaper. I got them for $2 each on Amazon last December.)
The control is backwards to our thinking. It's because warm air rises. Therefore higher up (in the cooling fins!) is actually warmer air which makes the thermistor think it's too warm and call for more cooling. Lower is cooler so the thermistor thinks it's colder so doesn't call for so much cooling. Weird, right?
Land of 10,000 Lakes
2016 Forester MBS 2401R
Nights camped 2016: 29; RV to date: 32