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 small warm air 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.
It is also possible that the air duct on the non-hot side is not open or blocked, and the air outlets are all open and closed. Just checking. If cold air blows from one side, check whether the control flap cable of cold and hot air in the warm air box falls off, whether the warm air impeller is damaged, whether the flap falls off, etc. After troubleshooting, the warm air will heat up. It is suggested that riders should regularly clean the air-conditioning pipes and make a comprehensive maintenance of the heating system of the car before the arrival of winter.