I bet it will be drinkable once carbed up right. Let it warm up over night then test the line. Then blast it. But seriously, this $5 amazon fridge thermo was a great investment. I stare at it every day to make sure the cooler is working right.
http://www.amazon.com/Taylor-Service-Classic-Freezer-Refrigerator-Thermometer/dp/B000BPE88E/ref=sr_1_1?ie=UTF8&qid=1328747014&sr=8-1
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