Buick Regal heating water pipe import and export area

The discrimination method of Buick Regal heating water pipe inlet and outlet is temperature discrimination method. Touch or test the temperature of the water pipe by hand. The inlet pipe is hot and the outlet pipe is cold. The lack of antifreeze in the cooling 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 first circulate in the engine. 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.