i set my +/- to 1oF and with the insulation over the probe that's where it stays.I tape my probe to the side of the vessel and insulate it from ambient in my freezer so the controller kicks things on or off depending on the temp of the probe. This allows me to keep the beer +/- 1oF from my set point.What +/- range do you use on your controller(assuming you can adjust)? I have a range of 7° Right now. When you put foam insulation over the probe does that change the variation of when the controller kicks on or off?
My freezer is in a pretty cool room with a 68oF ambient so the unit really doesn't run frequently unless I'm cold crashing a beer