[jimcol]

You might try removing the thermistor from the fin it is attached to and just let it hang in the air inside the box. What this should do is trick the controller to think it is calling for cooling. Then monitor your temps. These things don't cool real fast so be patient. If you can see the temps from the outside great, and you will know in a couple of hours. If you have to open the doors to see the temps, I'd leave both doors closed for 4 hours then check it. If change leave doors closed and recheck in maybe two hours. If it begins cooling below the 20's & 40's you were getting, the thermistor is either defective or the wrong one. This is just a trouble shooting step. You can't leave it off forever or it will freeze everything up even in your fridge.