Originally Posted by heferly
You probably got the connection wet, as stated earlier....this busts the thermometer...search for waterproofing your thermo....you'll have to bake the probe (with plastic outside the oven) to dry it out first.....bobbym has an awesome writeup on all of this somewhere...it's a pretty common issue
+1 to this. I used my digital thermometer last weekend for my first all-grain, but I was careful not to let the end of the probe where the wire attaches get wet. I will be using Bobby's write up to waterproof it so I don't have to worry about it next time.