After entering winter, many car owners will find that their car headlights will fog up and condense a lot of water droplets. In fact, this is a normal phenomenon, because there is a vent pipe on the back cover of the car headlights, which is mainly used for heat dissipation. The heat generated when turning on the lights is discharged from the breather tube, but sometimes moisture also enters the breather tube, causing fog in the lights. Sometimes car headlights may not be tightly sealed and water may enter. So how should we distinguish between fogging and water entering car headlights in actual use?
➤➤➤Why is there water vapor or fog?
In rainy days or winter, many car owners will find that their car headlights will fog up and condense a lot of water droplets. This is a normal phenomenon and is not a product quality problem. Because there is a vent pipe on the back cover of the car's headlights, which is mainly used for heat dissipation. The heat generated when the lights are turned on is discharged from the vent pipe. However, sometimes due to the temperature difference between the inside and outside, moisture will enter the vent pipe, causing the car lights to Mist and water vapor are generated inside.
How to tell whether the car lights are fogged or filled with water?
The external manifestations of headlight fogging and water intrusion are different. If you want to judge whether the headlight is in fact water intrusion or fogging, there is a way to make a preliminary judgment, which is to look for 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.
Of course, many car owners are confused when it comes to judging this, and they may make wrong judgments. There is another way. After the fog inside the car lights appears, it will take about 1 to 1.5 hours for the fog to be completely eliminated when the lights are on. In the static state, the fog inside the car lights will disappear after being stored in a dry environment with humidity <50% for 24 to 36 hours. It can be automatically and completely eliminated. This phenomenon is called fogging. If a large area of fog condenses on the inner wall of the lens and condenses into water droplets, which flow down and accumulate 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.
➤➤➤Differences between water intrusion and fogging in headlights and how to deal with them
Car headlights fogging up:
The reason why headlights fog up is mostly due to high air humidity, which causes water vapor in the air to condense in the headlights. It is normal for the headlights to fog up at this time. The reason for fogging is only related to the humidity of the air, not due to car washing, rain, snow, etc. Generally, there is not a lot of water vapor condensed when the headlights fog up. After turning on the headlights for 15 minutes, the water vapor will evaporate and will not stay in the headlights.
How to deal with headlight fogging
In this case, you don't have to worry too much. After the car lights are turned on for a period of time, the mist will be discharged out of the lights through the vent pipe along with the hot air. This will basically not damage the headlights and electrical circuits. In this case, you must not bake the headlights. Doing so can easily damage the headlights. Because the exterior of the headlights are made of plastic, the extra heat can easily bake the lampshades, and most of this damage is irreversible. repaired.
Water enters car headlights:
Due to rain, car washing, and snowing, a large amount of water has accumulated inside the headlights of the car, indicating that the headlights have been severely lax and water has entered. At this time, there is not only a lot of fog but also a lot of water inside the car headlights. If your car's headlights always have a lot of fog and water accumulation after a car wash or after it rains or snows, then your headlights must be replaced or re-sealed.
How to deal with water in the headlights
In addition to weather changes, human factors can also cause water to enter the car lights, such as vehicles wading in water, car washing, etc. If the water inside the headlight is enough to raise fish, then it is necessary to disassemble it and open the lampshade. After drying, check whether there is any damage or possible leakage on the surface of the headlight. If no abnormality is found, we generally recommend Replace the headlight rear cover seal and breather pipe.
Daily maintenance should be done well
Just like the oil filter needs to be replaced during regular maintenance, the headlight bulbs also need to be replaced regularly. Generally speaking, the brightness of the headlight bulb will weaken every 50,000 kilometers or about 2 years. At this time, it is best to go to a professional lamp replacement agency for inspection. If the brightness is indeed insufficient, it is recommended to replace the bulb. It is recommended to replace the left and right bulbs. Replace them at the same time to avoid different brightness on both sides.
There is another situation where the brightness of the light is weakened. The aging of the lampshade due to the influence of the environment will also weaken the brightness of the headlights. Dirty and aging lampshades will also make the light blurry and cause dizziness. Therefore, lampshades must be replaced in time if they are aging.
Adjust your car lights promptly
During the annual vehicle inspection, it will be checked whether the headlight beam position is correct. The correct beam position will make the field of view clearer and drive safer. When there is a problem with the car lights, it is necessary to go to a professional light modification agency to make adjustments in time to ensure safe driving.
Of course, if the water accumulation inside the car light is serious, it means there is a fault. At this time, professionals should inspect it to see if there is any damage or cracks on the surface of the car light. If so, the lamp cover needs to be replaced. ; If not, then you should consider replacing the headlight rear cover seal and vent pipe.
summary
Due to the limitations of the structure and working principle of car lights, the problem of fogging or water accumulation in cars cannot be completely avoided at this stage, including some luxury cars. However, it can be seen from the above introduction and analysis that products with excellent quality and workmanship will definitely have a lower failure rate.
Remind everyone: In winter and rainy seasons, it is best for car owners to develop the habit of regularly checking their car lights. For example, it is necessary to inspect the vehicle after it has been waded into water. Early detection and early remediation, and timely elimination of faults in their bud, are the best choices for car maintenance.
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