My Hova-Bator came today and I needed to put the thermostat in. I read the directions and put it in ok but it said turn adjusting screw counterclockwise until light comes on and then 4 additional turns. The light came on when I plugged it in so do I keep turning it until the light goes off again and then turn it again until it comes on? And it's not attached to anything but the adjusting screw, what makes it come on? Thank you for your help. I'm going to leave it plugged in until I hear from someone on here we are doing eggs on Saturday.