The carburetor in Pu Sang was replaced with a small water tank. Why is warm air not hot?

If there is air, all cars will automatically exhaust. Steps: First, fill the water tank with water and start it to 100 degrees. When the fan rotates, turn it off first, cool it to room temperature and then inject water. In this way, the air will be discharged automatically. If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.