Moving the thermistor will only affect temp IF the fridge does NOT have an adjustable temp control on upper panel (non-adjustable temp setting)
It is attached to the cooling fin in food section.
It has a sensor (bulb) on the end of tip.
It provides feedback to temp control.
Moving it up (into warmer area of fridge) will make cooling cycle longer (more cooling)
Moving it down (into cooler area of fridge) will make cooling cycle shorter (less cooling)
YET.....if it falls off and is laying down in lower section of food compartment fridge will go into continuous cooling resulting in frozen food