I have my Inkbird set up for celcius, and have the min/max levels set to +/-1c of my target temp, and a cooling delay of 3 mins. With an undercounter fridge stored indoors, it doesn't cycle on/off particularly frequently. I tend to ferment between 18-22c, so it's generally around room temp anyway, and when I'm trying to cold crash, it's pretty much running constantly to get down to 4c before I package.