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.
2. Lift the vehicle with a jack.
3. Unscrew the screw of the bottom shell of the water tank with a wrench, and connect the old liquid with the waste basin.
4. 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.
5. Add softened water and idle for 5 minutes, so that the inside of the cooling circulation system can be fully cleaned.
6. Add new antifreeze to the upper limit of water level.
7. Run at idle speed for 5 minutes, then observe the scale line of antifreeze tank and fill it up.
Extended data:
Matters needing attention in the use of automobile warm air:
1, don't turn on the warm air immediately.
Because in winter, the engine of the car has just started and the temperature of the water tank is still very low, turning on the air conditioner heater will not only increase the temperature inside the car rapidly, but also increase the burden on the engine.
Don't blow your face straight.
Being blown by dry and hot air on your face for a long time is easy to accelerate skin aging.
Don't set the temperature too high.
4. Don't smoke
Smoking with the air conditioner on will make a lot of amine and nicotine in the smoke adhere to the surface of the evaporator. When it rains or the air conditioner is not turned on for a long time, mold will be produced on the surface of the evaporator, which will seriously pollute the air inside the car.
5, open the warm air for a long time should pay attention to take a breath.
When the air conditioner heater is turned on in the car for a long time, remember to ventilate properly, otherwise in a closed environment, heat exchange will occur continuously during breathing, which will easily lead to air circulation. Window ventilation can drive away the dirty air in some cars and relieve the symptoms of chest tightness.
6, warm air is easy to breed bacteria.
Open warm air for a long time, it is easy to breed a lot of bacteria. Therefore, we should prevent the generation of wet fog. It is suggested that the heating can be turned off a few minutes before parking, and the natural wind can be turned on for a while in the state of opening external circulation to ensure the relative dryness in the air conditioning system.
People's Network-Why is it so cold? In winter, the air conditioner and warm air are not hot as hell.
Phoenix net-the correct way to turn on warm air in winter, even if you have been driving for many years, you may not know it.