It should be blocked. Find professional water tank maintenance personnel to clean and scale the water tank. This can not only improve the warm air, but also benefit the water cooling system of the whole vehicle. Be sure to find a professional. The washing tank leaks easily.
function
In cold winter (even in late autumn and early spring), the automobile heating system can provide heating for the automobile and increase the temperature inside the automobile. In winter, spring and autumn, when the air humidity is high and the temperature difference between the inside and outside of the car is large, frost and fog will form on the window glass, which will affect the driver's sight and is not conducive to driving safety. At this time, turning on the heating system can remove the frost and fog on the window glass.