1, one is caused by the engine cooling system,
2. The control mechanism of warm air doesn't work well.
When maintaining, it is necessary to determine what causes it first, and then carry out corresponding maintenance. Judgment method: 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.
The warm air of the car is blown into the cab by the blower. If the air volume is insufficient or the distribution of cold and hot air is not good, the heat of the warm air tank will not be radiated, and the temperature of the warm air will not come up. At this point, first check whether the filter element is dirty or blocked, clean it, and replace it in time if necessary.
Extended data:
Besides, don't turn on the warm air for too long. In winter, the warmth and comfort brought by warm wind are irresistible. Therefore, many car owners keep warm air on even during the long driving journey, which is actually not good. Because warm air is produced by the engine, some harmful gases will also enter the compartment with the warm air, which will easily lead to carbon monoxide poisoning.
In addition, if the warm air is turned on for a long time, the air inside the car will become very dry, resulting in no air circulation and an increase in the carbon dioxide content inside the car. At this time, opening a crack in the window can strengthen air circulation and eliminate some dirty gas in the car. In addition, it can also play a role in ventilation by adjusting the air conditioner to the external circulation every once in a while to let in fresh air outside the car.