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Colorado Johnson Controls A19AAT-2C Freezer Temperature Controller

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I'll take it assuming it works. My fridge kegerator just died unexpectedly and I'm gonna go with a deep freeze for a replacement.

How old is it?

Would like to get it by Friday.
 
I don't know how old it is I have owned it for about 5 years. It's works fine to regulate freezer temps it's being used as I type this to maintain my freezer at 35 degrees. I replaced it with a Ranco as I need heat and cold control for fermention control.
 
Just bought one of these on Amazon with some gift cards for my converted mini fridge. Reviews seemed pretty good. Where does everyone place the sensor in the fridge, right in the middle somewhere?
 
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