I took the defrost theromstat out of the fridge. I heard it open up so I tested it and got a reading of 1, I think that is normal when it is open, right? Then I tried to see if I could get it to close again, I got a class of ice water and set the thermostat in the ice and I could not get it to close again. Ill bet after 3 or 4 hours of that it would close though. I think we are after the right animal.