Is the lack of warm air in the car related to the amount of coolant?
Coolant is called antifreeze, which is the hot air source of automobile air conditioning. Its principle is different from that of household air conditioners. Automobile warm air circulation is a parallel pipeline in the small circulation pipeline of engine coolant. The pipeline is connected with the heater box.
The blower blows the warm air box to generate warm air. The warm air in the air conditioner is like this. Insufficient coolant in the cooling system is the most common and easily solved fault phenomenon, which will lead to warm air.
Methods of replacing automobile coolant:
1. Before changing the coolant, you must wait 10 minutes after the vehicle is turned off. After driving, the coolant temperature is very high and it is easy to burn.
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2. Conduct an all-round inspection of the vehicle: check the pipeline for signs of leakage and cracks, and check the five-way water pipe. If this part of the coolant leaks, replace the water pipe or re-fix the connection according to the situation.
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3. Lift the vehicle with a jack.
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4. Tighten the screws of the bottom shell of the water tank with a wrench, and connect the old liquid with the waste basin.
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5. Cover the expansion box cover with a thick towel, slowly loosen it until the air pressure is exhausted, and then completely remove the box cover. Use a compressed air spray gun or a thick towel to pressurize the water inlet of the expansion tank and remove it from the engine block as much as possible.
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6. Add softened water and idle for 5 minutes, so that the inside of the cooling circulation system can be fully cleaned.
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7. Add new antifreeze to the upper limit of water level.
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8. Run at idle speed for 5 minutes, then observe the scale line of antifreeze tank and fill it up.
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Second, the hot air tank is blocked.
In fact, the structure of the warm air water tank is a simplified 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 coolant flowing through the hot air box is blocked internally, the speed becomes slower, the flow velocity becomes smaller, the heat is insufficient, and the warm air of the air conditioner is naturally not hot.
Third, the thermostat is out of order.
The common fault of the thermostat is that it can't be opened, but the reason why the hot air is not hot due to the thermostat fault is that the thermostat can't be closed, which is usually called normal opening of the thermostat. After the thermostat is opened normally, the coolant will circulate a lot when the engine is idling. If the water temperature is low for a long time in winter in the north, the warm air of the air conditioner will naturally not heat up. It is also obvious from the thermometer that the pointer is obviously lower than the normal scale.
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