Got my temp controller today. It is hooked up to my GE 7CF freezer. First question. Should I have the Johnson plugged into a surge protector? Second Question it is a model A419ABG-3C. How can I find out if the temperature probe is water proof. Thinking of putting it in a cup of water. Set up so far is cooling mode cut-off, dif 3, APS 12min, and CF is set to turn the unit off if there is a failure. This thing seems great. Thanks!