Coolant, commonly known as antifreeze, comes from this, and its principle is different from that of household air conditioning heating. Automobile warm air circulation is to connect a pipeline in parallel in the small circulation pipeline of engine coolant, which is connected with a warm air water tank, and the blower blows the warm air water tank to generate warm air, which is how the air conditioning warm air comes from. The lack of coolant in the cooling system is the most common and easily solved fault phenomenon that causes the warm air not to be 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.
2. Clean up the blockage of the warm air tank.
The structure of the warm air water tank is actually a miniature version of the radiator of the engine water tank, and there are many small cooling pipes in it, which are as easy to block as the radiator of the water tank. After the inside of the warm air water tank is blocked, the coolant flows slowly, the flow rate becomes smaller, and the heat is insufficient, so the air conditioner warm air is naturally not hot.
The blockage of the warm air water tank has no effect on the heat dissipation of the engine (because they are connected in parallel). The reason for this situation is that the coolant contains too much scale, impurities, flocs and so on. These impurities are caused by careless maintenance. When adding coolant, replace them with water or other brands of coolant.
In addition, once the warm air water tank is found to be blocked, the radiator of the engine water tank will also be partially blocked (both have the same internal structure and circulate the same coolant). Clean the inside of the warm air water tank, the inside of the radiator of the water tank and replace all the coolant, so as to completely eradicate the fault.
3. Maintain the thermostat
The common fault of the thermostat is that it can't be opened, but the reason why the warm air is not hot due to the thermostat fault is that the thermostat can't be closed, commonly known as the thermostat is always open. After the thermostat is normally open, the coolant begins to circulate from the idle speed of the engine. If the water temperature is low for a long time in winter in the north, the air conditioning warm air is naturally not hot. It is obvious from the thermometer that the pointer is obviously lower than the normal scale.
In addition, long-term low water temperature of the engine will lead to high fuel consumption and increased wear (the engine is not working at the optimal temperature), so it is necessary to carry out maintenance and inspection immediately when the water temperature is low for a long time.
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Matters needing attention in turning on air conditioning in the car in winter
In the cold season, we need to raise the temperature inside the car quickly. When the car starts, the engine starts to warm up. After the engine temperature indicator reaches the middle position, first turn on the warm air conditioner, and set the air circulation to external circulation, so that the cold air in the car can be discharged outside the car. After waiting for 2 to 3 minutes, set the air circulation to internal circulation.
When it comes to rain and snow and the temperature difference between the inside and outside of the car is relatively large, the front windshield is prone to fog. At this time, we only need to adjust the direction of the warm air to the position where it blows to the front windshield, and the fog can be removed in a few minutes.
As we all know, sleeping in a car with heavy air conditioning is easy to get carbon monoxide poisoning. What about warm air? In fact, the principle of turning on warm air and cold air is the same: when the engine is working, if the fuel is not completely burned, it will produce high concentration of carbon monoxide.
When the car is running, the concentration of carbon monoxide in the car is very low because of the convection of air through air conditioning equipment; However, when the car stops driving, the warm air continues to turn on, and the windows are closed, the concentration of carbon monoxide emitted by the engine will increase gradually. Therefore, it is best not to sleep in a car with warm air when parking.
People's Network-Why is it so cold? In winter, the air conditioner and warm air are not hot as hell.