1. The heater water tank is blocked. In fact, the heater box of an automobile can be regarded as a scaled-down radiator of the engine water tank, and its internal structure contains many tiny cooling pipes, so this structure, like the radiator of the water tank, is prone to internal blockage. After the blockage, the flow rate of the coolant in the heater water tank will slow down, and the flow rate will also decrease. Due to insufficient heating, the air-conditioned heater will naturally not be hot.
There is something wrong with the thermostat. In fact, the common fault of the thermostat is that it can't be turned on, but if the heater is not hot because of the thermostat fault, it is because the thermostat can't be turned off, that is? The thermostat is always on? . After the thermostat is opened normally, the coolant will circulate from the engine idle speed. If vehicles are used in winter in the north, the water temperature will be low for a long time and it will never get up. The warm air of the air conditioner is naturally not hot. As can be seen from the thermometer, the pointer of the thermometer is obviously lower than the normal scale. Therefore, if the warm air is not hot and the pointer scale of the thermometer is still low, it may be necessary to check the thermostat.
3, warm water valve failure. After the hot water valve fails, the opening of the electronic control valve is no longer controlled by the computer, and it is in the state of normally open, normally closed or fixed position. At this time, there is no coolant flowing through the warm water tank or the flow rate is uncontrolled, so the warm air temperature of the air conditioner is naturally uncontrolled.
(Photo/Text/Photo: Pacific Auto Network Zhang Guiye)