Doug is confused about adjustable fridges not being affected by the thermistor location. Lets say for example that the fridge is satisfied with the top of the fin at 23F, the middle where the thermistor at 25F, the bottom of the fin at 27F and the fridge compartment at 35F. Now when you move the thermistor to the top the control senses "too cold" and the fridge will stay off until the fin temperature is 25F at the top, 27F at the middle and 29F at the bottom, with the fridge at 37F.
This is what's known as closed loop feedback in engineering. If you add an offset in the feedback, you affect the output.
The only thing an adjustable fridge does is allow the user to change the target temperature by changing the thermistor sensed resistance value where the fridge cycles. You still have minor control over where that temperature is achieved by the location of the thermistor. You're not really tricking the control board but rather expecting its set temperature to be achieved at a different physical location within the fridge.
This is just like installing your home heating thermostat near an open window. If you let cold air from outside hit the thermostat, your house will get warmer everywhere else, however you can also still decide what temperature "warm" is by adjusting the set point.
(Added F to the temps)
