Dongfeng Tianlong flagship has no north wind.

The thermostat often doesn't open, and the coolant circulates from the idle speed of the engine. If you use a car in winter in the north, the water temperature will be low for a long time and you will never get up. The warm air of the air conditioner is naturally not hot. As can be seen from the thermometer, the pointer is obviously lower than the normal scale.

There are many tiny radiating pipes in the internal structure of the car's warm air water tank, which is easy to be blocked inside. Scaling, impurities, flocs and deposits in the coolant may cause blockage. After the heater tank is blocked, the flow rate of the coolant in the heater tank will slow down, and the flow rate will also decrease. Due to insufficient heating, the air conditioner heater will naturally not be hot.