Is it normal to have fog inside your headlights? What is the reason for the fogging of car headlight

There is still no problem with a small area of water mist, if there is water accumulation, then it is necessary to check whether there is a dust race or a problem with the headlight sealing.

Mild fogging, the cause of which is only related to the humidity of the air.

Generally, the water vapor condensed by the headlamp fogging is not very much, the headlight assembly has several air intakes and exhaust holes, the function is, when the headlights are lit, the air temperature in the headlights is balanced, so that the hot air is discharged, and the cold air is inhaled, when the outside air is humid, it is sucked into the headlights, and the hot air is discharged, and you turn off the lights, so that the temperature in the headlights is low, and the humid air condenses into water mist and attaches to the lights.

Usually when the fog is encountered, as long as the headlights are used normally, it will be completely dissipated in about 1 week, if it is particularly serious, you can open the back cover of the headlights, turn on the headlights, let the bulb heat dry the fog inside, and then cover the waterproof cover after cooling. It's also a good idea to put a sachet of desiccant.

Severe fogging (fog forming water droplets, water ingress, etc.), the cause of this kind of failure is generally due to cracking of the headlight assembly, the dust cover is not covered, the dust cover is broken, the sealant is aging, etc.

After driving the car, the temperature in the headlights is still very high, a large amount of high-humidity air enters, and the outdoor temperature is relatively low, and a layer of water mist will condense in the headlight assembly. The next morning, it will be foggy and even water droplets will gather into a puddle of water in the lamp, which will seriously affect the lighting effect of the headlights and cause unsafe driving.

If this is happening to your car's headlights, the only way is to go to your local tuning shop or repair shop to fix the headlight problem, or replace it with a new headlight assembly. If the headlights are left unchecked, the aging of the headlight assembly will be accelerated, and the vehicle will spontaneously combust due to short circuits, which cannot be ignored.

1. The reason for the fog in the headlights of the car:

1. Temperature difference change: turn off the lights immediately after using them for a long time, which can easily cause the lights to fog up;

2. Improper car washing: using a high-pressure water gun to flush the car lights can easily cause water droplets to flow into the ventilation holes, causing the lights to fog up;

3. Wading too deep: once the depth of the water exceeds the wheel, it will enter the headlights from the vent;

4. Rain and snow can easily lead to water ingress into the headlights, which will then produce fog.

Second, the solution to the fog in the headlights of the car:

1. Park your car in the sun or in a dry place.

2. Start the car engine and turn on the headlights to light up all functions.

3. Drive the car directly, and the fog in the lamp will dissipate faster.

4. If you find that the lights frequently appear water mist, the main reason is that the headlight sealing ring is not well sealed, it is best to check the lamp body, the current lights are generally integral, if the damage is more obvious, it is better to replace it.

Car headlights are mostly not hermetically sealed, with a vent in the rear. When the humidity is high and the temperature difference between the inside and outside of the headlamp is large, there may be a small amount of fog on the inner wall of the lampshade, which will disappear automatically after a period of time after turning on the headlight.

If the fog is very high, it is most likely caused by a poor sealing of the headlight cover.

Hello! This is caused by the lack of tight sealing of the headlights, and it can be solved by sticking a soundproof cotton behind the headlights.

The car butler team has you covered.

Hello: The seal is not good and the water has entered, so open it and reseal it.

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The headlight assembly is not well sealed, resulting in water vapor [car problems, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

If the water enters, the temperature rises and water vapor is generated, check whether it is damaged or the seal is not good, replace it if it is broken, and apply the glue if the seal is not good.

Hello, the headlights are not well sealed and water, it is recommended to find out the location of the poor seal with sealant after drying.

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The headlights are not well sealed, and this phenomenon will naturally get better after a while. Don't worry.

The reason for the fogging of the headlights is mostly due to the high humidity of the air, which causes the water vapor in the air to condense in the headlights. At this time, it is normal for the headlights to fog up, and the reason for the fogging is only related to the humidity of the air, not due to car washing, rain, snow, etc. Generally, the water vapor condensed by the headlight fogging is not very much, and after turning on the headlight for 15 minutes, the water vapor will evaporate and will not remain in the headlight.

1. The car headlights are not well sealed, and the back cover of the car headlights has a plastic ventilation channel, from which the gas that expands in the lamp will enter and exit when it encounters heat, and sometimes, some moisture enters the ventilation hole, and a slight fogging phenomenon will occur. This kind of fogging due to temperature differences mostly occurs in winter, rainy season, or foggy days.

2. If the owner encounters fog in the headlights, the reason for the fog should be analyzed first, if it is caused by temperature difference or moisture, such as using the lights for too long, the lights will be turned off directly after the vehicle is stored or stopped, and the next morning it will be found that there is fog in the lights, as long as the owner turns on the headlights, the water mist in the lights will begin to disappear slowly after 10-20 minutes.

3. Generally speaking, the moisture in the lamp will slowly evaporate and disappear under the normal use of the lamp or sunlight, if your lamp frequently appears to enter the water, you should go to the repair shop to check the sealing condition of the lamp body.

There is always fog in the headlights, indicating that the headlight assembly shell is not tightly sealed.

Does it matter if the headlights of the car are foggy and there is water? Will the car break down?

1. Temperature difference change: turn off the lights immediately after using them for a long time, which can easily cause the lights to fog up;

2. Improper car washing: using a high-pressure water gun to flush the car lights can easily cause water droplets to flow into the ventilation holes, causing the lights to fog up;

3. Wading too deep: once the depth of the water exceeds the wheel, it will enter the headlights from the vent;

4. Rain and snow can easily lead to water ingress into the headlights, which will then produce fog.

Hello fogging may be your headlight leaking and need to replace the headlight.

Causes of fogging of car headlights:

1. The main reason is that when the temperature in the lamp drops suddenly, the external high-humidity air enters the lamp, and the water vapor in the lamp condenses to form water mist;

2. In order to ensure the balance of pressure inside and outside the headlamp, the headlamp assembly is designed with dust-proof ventilation holes, and under normal circumstances, the fog in the headlamp will disappear naturally;

3. If the water vapor in the lamp accumulates too much, then it is necessary to carry out the operation of removing the fog.

There is an exhaust hole behind the headlights to prevent the headlights from overheating and to circulate air. Washing a car or raining can cause water vapor to enter the headlights, which can become fog after condensation. The hesitation hole is relatively high, and the hole is not large, so the total amount of water entering each time is small.

This situation is easy to deal with, and it will disappear automatically after 5 minutes of turning on the headlights. Your headlights are visually inspected.

The strict definition of headlight fogging should be a fault, there are hundreds of mass-produced cars, there are thousands of versions to choose from, and how many of the more than 200 million mass-produced cars have experienced atmospheric fogging? It seems that in the rainy season in the south, when there is more rain, if you are good at observing, the probability of finding headlights on the road will be very low, so the description of water vapor due to the vent is strong and unscientific!

Whether the headlamp is halogen, xenon or LED light source, it will produce a high temperature during use, and the temperature in the lampshade will rise simultaneously, and the internal and external pressure must be balanced to ensure that the shell is not broken; As a result, the headlights always have a set of vents, which are naturally balanced by the pressure of the air flow (the position of the vents is shown below).

However, the vent does not really leave a hole, and dry cotton will be used to absorb moisture in the air in the hole to ensure that the humid air will not enter the headlight housing and cause fog; And even if the humidity in the air is high, it will not be high enough to soak the entire dry cotton, otherwise normal breathing will be "drowned".

And the position of the vent is behind the headlight housing, and the headlight assembly is fully protected by the headlight group, the fenders on both sides, the hood and even the engine underguard, and it is impossible to cause liquid water to rush directly to the vent behind the headlamp assembly in the vehicle driving, and the humid air will also be driven away and evaporated by the wake in the engine compartment; When parking, the largest rainstorm cannot enter the engine compartment through all-round protection and splash into the headlight vents, which is about the same probability as the middle five million.

Therefore, fogging of headlights is by no means a normal phenomenon, unless the hood is directly opened and the cabin is washed with a high-pressure water cannon, or the water waves splashed into the back of the lamp housing by deep wading; If there is such a car behavior, it is not surprising that the headlights are watery, and if not, it can only mean that there is a problem with the quality of the headlights.

The reason for the fogging and water ingress is that the dry surface of the vent is not suitable or there is no at all, and the probability of this situation is not high, but it cannot be ruled out that the manufacturing level of some lamp group manufacturers is poor; Secondly, the sealing of the lamp shell is not ideal, or the vehicle has been modified to remove the lamp shell, and the sealing and waterproof treatment at the gap will be damaged, which will definitely lead to fogging in the lamp.

Fog is water suspended in the air with a very sufficient humidity of 100%, and the essence of headlight fogging is that the headlights enter the water, so this will not be a normal phenomenon; Similar situations have been dealt with, such as the two headlights of the car that have been used have entered the water, and the claim process was told that it is the set described by **, but after the anti-popularization of structural knowledge, the headlights were also allowed to claim for the headlights, and the replaced headlights never fogged up again, and the staff's conclusion was that there were quality problems with the headlights in this batch, which is the fact.

Therefore, after the headlights are fogged, if the vehicle is under insurance, it is recommended to claim the assembly, and if the vehicle is out of insurance, it is recommended to disassemble and reseal.

The mild ones have no effect, and the severe ones can go to 4S to claim compensation, and the sealing is not tight. 1. Why are the headlights fogged 1. The temperature difference changes, and the lights are turned off immediately after using the lights for a long time, which is easy to cause the lights to fog up; 2. Improper car washing, some car owners like to use high-pressure water guns to flush car lights, which can easily cause water droplets to flow into the vents, causing the lights to fog; 3. Wading in the water.

This could be due to foggy weather, or it could be due to the lights cracking, allowing dust to get inside.

It may be raining and some water has entered the headlights of the car, it may be that there is a problem with the wiring or it is aging, so there will be fog, and you should go to the 4S store for a detailed inspection.

The sealing of the headlights is not very good, and some water vapor appears in the lamp, and fog is generated through the temperature difference.

It's likely that there was a crack in the headlight, or because the headlight was broken, causing the fog to run into the headlight.