Buick Angola heating water pipe import and export area

The distinction between the inlet and outlet of automobile warm water pipes is as follows: the inlet pipe is hot and the outlet pipe is cold. But the lack of antifreeze in the system is the most common reason why the warm air is not hot. When designing the engine cooling system, engineers will give priority to engine heat dissipation, and then the warm air can work normally. When the coolant is insufficient, the coolant will circulate in the engine first. At this time, there is no "water" in the warm air circulation pipeline, and most of the warm air tank is gas. At this time, the air conditioning warm air is naturally not hot. After adding antifreeze, the warm air tank is filled with boiling coolant, and the warm air will naturally heat up.