@Wayne-TP I discovered that shortly after I wrote the query. I thought "lets be silly and write 2 independent control rules and let's set them both trigger at 15 deg (that will confuse the system)",...

I am trying to use a T310 and P110 plug to turn a heater on at 15 degrees and off when it is warmer than that, a simple thermostat control. The sensor works fine and the plug works fine. I can set up...