Why is my car s front windshield fogged when the heater is turned on in winter?

Now that the weather is gradually getting cooler, many people usually find a lot of fog condensation on the car glass when driving. Fog builds up on the car, and the owner loses vision when driving on the road. Once you come to a complex road environment, it is easy to cause traffic accidents.

So the procedure that must be done in winter is to defog. And many people can choose to use the method of turning on the warm air when facing the fog in the window.

The reason for the fogging of the car window is very simple, that is, the "outside" is cold, the outside temperature is low, and the temperature inside the car is high, the fog will appear, because it is formed inside the glass, so there is no way to remove the fog with the wipers. Under normal circumstances, there is a front windshield defogging function button in the button area of the car dashboard, and the defogging function can be unlocked by pressing the corresponding switch.

Car heaters can raise the temperature inside the car, and then the fog gets bigger and bigger, and the water outside the window tends to collect and drip down. When there is a heater, most people will use the air conditioning button because the engine temperature is heated and very dry, which is not only short but also difficult to fog up. But the AC button turns on the air conditioner compressor, which will cause an increase in fuel consumption.

In fact, car defogging can not only be blown by warm air, but also can be used in this way, not only does not consume fuel consumption, but also can achieve a perfect defogging effect. We need to wash the towels at home, and mix the detergent and water in a ratio of 1:10 to make a natural fog remover.

Usually pour the defogger on a towel when driving, then wipe it on the windows, apply it evenly to the end, and then wash both sides of the windows. This prevents car fog from forming again.

There are also the following methods for car owners to choose from:

1. Open the windows to allow air convection inside and outside the car, but this method is not suitable in rainy and snowy weather or on highways.

2. In addition to the warm air can remove the fog, the air conditioner can also remove the fog, and the defogging speed is faster, but the temperature in the car will be reduced accordingly.

3. The owner can spray a special glass spray, which has a more obvious anti-fog effect and a long-lasting effect.

Because the temperature in the car is relatively high, the outside air is relatively cold, and the temperature of the glass is relatively high, and some water vapor in the cold air will liquefy, so there is fog on the glass.

Because the air inside the car is hot and the outside is cold, the car glass will be fogged, and the glass should be prepared for defogging in winter.

The weather is particularly dry, and the weather in winter is particularly cold, which will fog up your car. Because the temperature inside the car is very high, the temperature outside is very low.

It is likely that air has entered the front windshield, or it is possible that there is a problem with the wipers, so this situation will occur, and it may also be because of the lack of oxygen in the car, and the air conditioner should be turned on at this time.

1. Rational use of air conditioning system.

2. Use special anti-fog products.

3. Open the window to convection of hot and cold air.

4. Wipe with dish soap and dry cloth.

5. Defogging of the heating wire of the rear windshield.

Reason: The air in the cabin is hotter and the front windshield is cooler. Moisture in the air inside the cabin condenses on the front windshield, resulting in fog.

Solution: The premium sedan will have a separate front windshield defog switch, turn it on.

For low-end cars, you can adjust the fan outlet to the front gear ratio, so that the hot air blows on the front windshield to facilitate the evaporation of water vapor.

Precautions for driving in winter:

1. Do a good job in seasonal maintenance of vehicles. Carry out comprehensive inspection and maintenance of vehicle brakes, steering, driving systems, gas pipelines, water pipelines, oil pipelines and other components, equip the vehicle with necessary anti-freezing devices, and add engine oil and gear oil according to regulations.

2. Grasp the road condition information through TV, radio and other means in advance, bring necessary tools such as snow chains and shovels, and prepare in advance.

3. When driving on ice and snow roads in winter, you should not drive in higher gears, but should control the power of the vehicle and leave room for it, and minimize the number of gear changes to prevent accidents. Maintain an even driving speed when driving, reduce the speed of the vehicle, reduce or avoid changing lanes and overtaking vehicles as much as possible, and strictly prohibit the use of emergency braking.

4. When driving in foggy weather, turn on the anti-fog lights and low beam lights in time, reduce the speed, strictly abide by the principle of passing on the right side and going their own way, and maintain a sufficient safety distance between vehicles and pedestrians.

5. In winter, the operation of the vehicle must be paid attention to not too strong and too large, especially the action of hitting the direction and stepping on the brake can not be too strong and too large.

6. Keep a safe distance from the car in front of you, and leave sufficient reaction time and braking distance.

7. When steering on ice and snow roads, reduce the speed of the vehicle in advance, turn the steering wheel slowly, and pass at a constant speed to avoid sudden direction, otherwise it is easy to cause the car body to slip and lose control.

It is mainly caused by the large temperature difference between indoor and outdoor, so he will have condensation, inside you can use a cotton towel to wipe it, outside is serious, you can use a wiper brush to scrape.

It's because the temperature inside is higher than the outside, so the outside temperature is too low to cause dewdrops.

It is because the temperature of the windshield is low, and the hot wind blows up and the cold and hot alternately will definitely fog up, at this time open the external circulation, and then blow the wind direction to the windshield and turn on the AC switch, the fog will disappear immediately, and there is no need to change the temperature of the air conditioner. After a while, turn off the AC, because the AC is a compressor, which is refrigeration, and at the same time increases fuel consumption.

The cause of windshield fogging is caused by a large temperature difference between indoor and outdoor in winter. If the driving environment is more complicated during driving, you can use the cold air to carry out, which has the advantage of quickly removing the fog on the windshield and avoiding the inability to see the road due to fogging. However, because the indoor temperature needs to be high in winter, after removing the fog, the temperature should be adjusted to the warm air position several times to prevent the fog from reappearing.

If you are in the parking phase or just hot car stage, you can directly use the way of blowing warm air, although the fog removal time is relatively slow, but the warm air should be turned on all the time, if necessary, turn on the front windshield defrost function. This prevents the fog from re-generating and meets the temperature needs of the indoor driver.

In the winter of the car, the fog on the glass should turn on the cold air. Turn on the air conditioner, which can not only quickly remove the fog, but also not fog for a long time, but it is not suitable to turn on the air conditioner in winter, the most suitable way is to turn on the warm air.

The reason for the fogging is very simple, that is, the temperature outside the car is low, and the temperature outside the car is high due to people's breathing and warm air, so the front windshield will often fog up.

Another simple way is to open the windows for ventilation, open the front two windows to form a convection, which can alleviate the fogging reaction, which is the simplest and most effective way to do this. But this method also has a drawback, that is, it is not easy to use when the weather is bad.

Turn on the cold air.

The formation of fog is caused by the temperature difference between the cold outside and the heat inside, and if it is not eliminated in time, it will bring potential driving safety hazards. In the case of small fog, you can properly open the windows on both sides to let the air convection, so as to eliminate the temperature difference on both sides of the windshield, and the fog is naturally difficult to form. Or turn on the air conditioner to cool the air, which can eliminate the fog in a very short time.

The advantage of both methods is that they can achieve quick results, but the disadvantage is that they should not be carried out for a long time when the weather is cold, or when it is snowing or raining.

The biggest problem with blowing hot air is that it is slow to take effect, and it takes a long time to see the effect. And it is more fuel-consuming to turn on the heater while driving, and the cost is a bit high.

When the window is fogged, turn on the cold air or warm air, just a few simple tricks, quick effect, and powerful.

In fact, turning on the cold air can remove the fog from the car window! Turning on the cold air will make the temperature difference between the inside and outside of the car smaller, which will make the fog formation conditions insufficient, and achieve the effect of removing the fog. Advantages: The fog can be removed in a short time, and the speed is fast.

Turn on the cold wind in winter, this operation is fine. In winter, the fogging of the glass is mainly due to the large temperature difference between the inside and outside, forming a water mist on the glass, which is generally because the temperature in the car is too high, so generally when I drive, I will open a little window first, and then turn on the hot air, and close the window after blowing for a while.

Before driving, use hot air. It is good to lower the temperature after all the fog is dry, so that the hot air will not fog up again during driving, because the inside of the car is dry.

Of course, the hot air will dry the water in the car, and the humidity will decrease, so that fogging conditions cannot be formed. Achieve the purpose of removing fog. Advantage: The occupants of the car will not be frozen.

In winter, defrost the front windshield of the car, first turn on the cold air to quickly defrost, and then wait for the engine temperature to come up and then turn on the hot air, and then defrost, which is equivalent to saying that the compressor is not started, which is more fuel-efficient.

I usually turn on the cold air, and I turn it off after a while when there is no fog. Generally speaking, open the cold air to blow the glass, the gear is increased, the effect of removing the fog is faster and more effective, suitable for the fog formed by the temperature difference between the inside and outside the car when it rains, and the cold air layer film caused by the air in the car. The hot air can also get rid of the fog, but the speed is relatively slow, and depending on the situation, when the fog is foggy on a rainy day, blindly turn on the hot air, which only works on a small piece of the air outlet glass, but you will find that the local not only does not change, but the fog becomes more serious, which is caused by the temperature difference between the inside and outside of the window.

Generally, the button area of the center console on the car will have the defogging function button of the front windshield and the rear windshield, and the defogging function can be turned on by pressing the corresponding switch. In addition, there are several other ways to remove fogging from the windshield:

1. Open the windows to allow the air inside and outside the car to convection, but this method is not suitable when driving in rainy and snowy weather or on high-speed roads.

2. In addition to the warm air that can remove the fog, the cold air can also remove the fog by turning on the air conditioner, and the removal speed can also be faster, but the temperature in the car will be reduced accordingly.

3. The owner can spray a special glass anti-fog spray, which has an obvious anti-fog effect and lasts for a long time.

Precautions for the use of car air conditioners in winter.

1. Do not turn on the heating air conditioner immediately when the car is warmed up in the morning, and wait until the water temperature of the engine water tank rises before turning on the air conditioner.

2. The temperature of the air conditioner should not be too high, generally not higher than the degree, the temperature of overheating for a long time will make you sleepy and affect driving, and do not let the warm air blow directly on your face.

Hello, dear. In winter, the fog blowing warm air on the front windshield of the car disappears because: the temperature of the warm air is high, and the temperature of the fog is increased, and the warm air can speed up the air flow, thereby accelerating the evaporation of the fog, so the fog disappears after the warm air is turned on.

The cause of fogging in the windshield of a car is caused by the temperature difference between the inside and outside and the humidity of the air. If the temperature inside the car is high and it is cold outside, the moisture inside the car will condense onto the cold glass, forming a fog. At this time, it is usually necessary to turn on the air conditioner to the blown glass position and blow the fog away with warm air.

But before the hot air is not heated in the glass, it will bring a larger fog to the late sparrow for a short time. Therefore, you can use cold air to blow the glass, or open a little window, the temperature of the glass is consistent inside and outside, and there will be no fogging In some areas in the south, on the contrary, the temperature inside the car is low and the outside of the car is humid and hot, and the water vapor will adhere to the outside of the cooler glass.

Summary. After turning on the heater, the main reason is that the temperature inside the car and the temperature difference between the outside is relatively large, and there will be this fog phenomenon on the front windshield, and there will be a defrost button on the air conditioning system, and after the brush button is turned on, the fog on the entire glass will be blown off.

In winter, the warm air is fogged on the front windshield. What is the problem?

Hello, happy to answer your questions.

After turning on the heater, the main reason is that the temperature inside the car and the temperature difference between the outside is relatively large, and there will be this fog phenomenon on the front windshield.

It seems to be antifreeze mist.

This is not the fog of antifreeze, this is the temperature difference between the inside and outside of the car, and there will be this kind of brother group image. Just turn on the defrost button on the air conditioner.

In winter, the solutions for fogging the heater glass in the car include air conditioning, cold air, window opening, and glass anti-fogging spray.

1. Air conditioner cold air.

Blow the front windshield to keep the inside and outside of the front windshield at the same temperature and form a dry wall of wind to prevent condensation from the mist.

2. Open the window. <>

Convection of air inside and outside the car.

3. Glass anti-fog spray.

A transparent hydrophilic layer forms on the surface of the car's glass. When the humid air in the car comes into contact with the hydrophilic layer, it will evenly attach to the hydrophilic layer to form a water curtain, and the light will not be refracted through the water curtain and will not affect the driver's line of sight.

Causes of fogged car windows

The main reason for the fogging of the car window is that the temperature and humidity inside the car and outside the car are not the same, in the winter the glass fogging is in the car, because the temperature of the parking space is low, the temperature of the air conditioning in the car is relatively high, resulting in condensation, the water vapor meets the cold glass and forms small water droplets, that is the fog, in summer it is the opposite, the fog is outside the window, and the window fogs up in winter, and many people open the cold air to remove the fog.

Fogging of vehicle glass is caused by a large temperature difference between indoor and outdoor temperatures in the current environment. If it is configured as an automatic air conditioner and can select the position of the air outlet, it is recommended to select the position of the front windshield and the middle air outlet, and turn on the rear windshield heating function, so that the interior glass has been regulated due to the temperature.