The reason why the car warm air is not hot.

Go to a reliable roadside shop to clean the water tank and warm air tank. It's simple. Unplug the water inlet and outlet pipes and rinse with water. The water pressure must not be too high, it may leak. Then clean the antifreeze bottle. My car has just been washed. Everything poured out is like paste, which is terrible. Just replace it with antifreeze and warm air, about182,300. Prices vary from place to place. It is faster to turn on the internal circulation, and the external circulation is to blow the wind outside the car into the car. If the temperature outside the car is very low, the air conditioner will slowly heat up.