burner on high
All sense temps run on full blast; Until... the sensor tells the responder to "shut down" , you just passed the desired or 'dialed in temperature'. If you do not have a pot with say some water in it, on the sensi-temp burner, the burner will continuously run 'full blast'. There is nothing on top of the sensor getting hot enough to make the sensor tell the responder to shut off. Once the pot cools and drops slightly below the dialed in temp, the sensor tells the responder, ok, turn back on. It waffles just above, then below the temp selected. That's a rough explanation of how it works IMO. Les. (someone correct me if I'm wrong. )