Is the lack of warm air in the car related to the weather?

Yes, but it doesn't matter much. The vehicle heating system is not hot, which is divided into two reasons, one is caused by the engine cooling system, and the other is caused by poor operation of the heating control mechanism. When maintaining, we must first determine which cause it is, and then carry out corresponding maintenance. The method of discrimination is simple. Look at the temperature of the two inlet pipes of the warm air small water tank. If both pipes are hot enough, there is something wrong with the air flow control mechanism. On the contrary, if both pipes are cold, or one is hot and the other is cold, it is a problem with the cooling system. Problems that may occur in the cooling system, such as the thermostat is always on or the thermostat is turned on too early, make the cooling system carry out a large cycle prematurely, and the outside temperature is very low, especially when the car is driving, the cold air quickly cools the antifreeze.