As long as you turn the knob on the right side of the picture above and below (the top is blue and the bottom is red), and the white dots are facing the red, warm air will blow out. The knob in the middle is the fan switch and wind speed 1 to 4. Switch, the left one is the wind direction knob, the upper one blows the front shield, the left one blows the driver's front and glass, the right one only blows the driver's front, and the lower one blows the driver's feet. When turning on the heater, it is best to blow the feet downward.