Is it related to the heater water tank that the antifreeze cannot be discharged after replacing the antifreeze in JAC Ruifeng S3?

This problem is related to the heater water tank.

JAC Ruifeng S3 is a small SUV. The inability to vent the air after changing the antifreeze is related to the heater water tank. In the vehicle's cooling system, antifreeze not only cools the engine, but is also responsible for providing warm air inside the vehicle. The heater water tank is part of the antifreeze circulation system. It is responsible for heating the antifreeze, and then blowing hot air into the car through the blower to increase the temperature inside the car.

If there is air in the heater water tank that is not drained cleanly, the air will form an air block when the antifreeze circulates, causing the antifreeze to fail to circulate normally. Air lock will hinder the flow of antifreeze in the cooling system, thus affecting its cooling effect. At the same time, since the density of gas is smaller than that of liquid, the gas will float upward, while the antifreeze will sink downward, forming a convection phenomenon, which will reduce the heat dissipation effect of the heater water tank.