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Car Owner | Car lights fogging up and water entering are annoying! Need repairs?

Car lights are the eyes of the car and are of great significance to safe driving. However, as car headlights become foggy and water enters, they may even condense into many water droplets, causing many hidden dangers to driving safety and causing worries. However, is the fogging of car headlights a quality problem? What is the reason? Is there a difference between fogging headlights and water entering the headlights? What should you do if your car's headlights are fogging? Next, Car Owner will help you Do detailed analysis.

Car Owner | Car lights fogging up and water entering are annoying! Need repairs? 1

1. Why do car lights fog up?

When gas with high temperature and high humidity comes into contact with low-temperature substances (such as glass, etc.), it will condense into water droplets. That is to say, the moisture contained in the air increases as the temperature rises. If the temperature drops, it will condense and form. causing condensation to occur.

The car lights themselves are not completely sealed. There are vents to balance the internal and external air pressure. Under suitable conditions, such as when a vehicle is driving on a rainy day, the window glass cools rapidly and the temperature near the glass inside the car also drops sharply. Therefore, the moisture contained in the air will condense, and this moisture will adhere to the inside of the window glass. , the car lights will condense and fog up.

2. How to deal with headlight fogging

Troubleshoot the cause: To determine the cause of headlight fogging, first rule out whether you have recently driven in rainy days, waded in water, or washed the car. If you have driven in rainy days, waded in water, or washed your car, then the fog in the headlights is likely caused by water ingress, and you need to check first.

Check whether the headlights are damaged: During normal driving, the headlights may have been hit by stones crushed by other vehicles because you were not paying attention. Or if the car is parked in the parking lot and you are not at the scene, the dust cover of the headlight has been scratched, resulting in damage or cracks in the lamp cover. Please check it carefully first.

The lampshade is not tightly sealed: If the headlight dust cover is not damaged or cracked, it is likely that there is a problem with the sealing gasket. Because the sealing is not tight, water seeps into the headlights, causing fogging. This requires going to a professional car maintenance center to check and deal with it at a car service store that Car Hero cooperates with.

Water condensation: If it is not caused by rain, wading, or car washing, it is caused by the difference in hot and cold temperatures caused by climate. Just like when we drive normally, when the temperature outside is relatively low and the temperature inside the car is high, condensation will form on the windows. Generally, this happens when we use lights, but this happens only occasionally, and when exposed to heat, the fog in the headlights will slowly dissipate. If this phenomenon always occurs, there is a problem with the lampshade and gasket, and further investigation is needed.

Fog removal method: If there is slight fog in the headlights, just turn on the car's headlights and bake them. The fog will slowly evaporate when heated.

Sunlight exposure: If the fog in the headlights is relatively heavy (water has entered to be precise), then it will be more troublesome to rely on the light of the headlights for baking. It is best to drive the car to a sunny place and use the ultraviolet heat of the sun. Let the headlight fog slowly evaporate. Generally speaking, as long as there is no internal fogging, but only fogging on the inner surface of the lampshade, it is normal. Usually after the car lights are turned on for an hour, the fog in the area illuminated by the light can be completely dissipated, and at the same time, the fog in other areas It basically dissipates and does not affect the normal use of car lights.

Car Owner | Car lights fogging up and water entering are annoying! Need repairs? 2

3. How to deal with water ingress into headlights

Water entering the car headlights not only affects the appearance of the car lights, but also reduces the lighting effect, affecting driving safety at night or on rainy days. At the same time, water entering the headlights also indicates that the sealing is insufficient, which will cause moisture and pollutants to enter the interior and cause problems with the vehicle wiring. This must not be ignored. Therefore, if the car lights get water, they need to be repaired and replaced at a car dealer's cooperative auto service store in time. Otherwise, it is very easy to cause damage to the car lights. When we drive every day, especially in summer and winter when moisture is relatively abundant, we must develop a good habit of regularly checking vehicle headlights.

4. How to distinguish whether it is fogging or water intrusion?

To determine whether the headlights are filled with water or fogging, first we look at the traces of water flow.

Fogging is generally caused by a film or dewdrops forming on the surface of the headlight lampshade, with no trace of water flow. Due to the large amount of water entering, it condenses into dewdrops and flows from the top of the headlight to the bottom of the headlight. This will form obvious traces of water flow, similar to a waterfall. Even if the water dries, there will still be some traces, just like the path of a snail. There will be traces.

Car Owner | Car lights fogging up and water entering are annoying! Need repairs? 3

Secondly, we also judge by whether it will disappear on its own. After the fog inside the car lights appears, it will take about 1 to 1.5 hours to completely eliminate the fog with the lights on; in a static state, it can be stored in a dry environment with humidity <50% for 24 to 36 hours. The fog can be completely eliminated automatically and this phenomenon is called fogging. And if a large area of ​​fog condenses on the inner wall of the lens and condenses into water droplets and flows downward, accumulating inside the car light, when the car light is used for a long time and many times, as the temperature rises, the fog will adhere to a large area of ​​​​the inner surface of the light distribution mirror. , this phenomenon should be judged as water intrusion.

(The content of this article is compiled from the Internet. If there is any infringement, please contact the author to delete or change it.)

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