Fixing Vehicle Air Conditioning On Glass When Cold Open

How to Fix Car Passive Air on the Glass
Latest update date: February 07, 06

Car windows get condensed when opened when cold obstructing the driver's vision, this phenomenon not only affects visibility, but can also lead to dangers when participating in traffic. The main cause of this phenomenon is the large difference in temperature between inside and outside the vehicle, combined with high humidity in the cabin. This causes water vapor in the air to quickly condense on the glass surface, causing a foggy image.

Additionally, cooling system problems, lack of proper air circulation, or other errors can also cause this condition. To effectively fix it, the driver needs to apply measures such as turning on the air conditioning, using a dehumidifier, or cleaning the vehicle's windshield periodically. Quick and thorough handling will help ensure visibility and safety when operating the vehicle.

In the next post, Thanh Phong Auto guide you How to fix the situation of car condensation on the glass when cold opening?. Check out the details!

How to Fix Car Passive Air on the Glass
How to Effectively Handle Car Condensation on the Glass

Why Does Car Condensate On The Glass When It's Cold On?

Cars get water vapor on the glass when cold opening comes from the following reasons:

  • Large temperature difference between the outside and inside of the car interior.
  • Inadequate ventilation prevents water vapor (formed from the cooling system) from escaping to the outside, resulting in condensation on the glass.
  • An improperly functioning cooling system also causes a lot of condensation in the car.

To prevent condensation on the windshield when cold, you must use the correct cooling system, regularly check the operation of the air conditioning, ventilation, etc.

How to Fix Car Condensation on the Glass When Cold Opened

To overcome the situation of car condensation on the glass when cold, you can take a few measures:

How to Deal with Vehicle Condensation on the Glass
Turn off the air conditioner and open the car door to let the car ventilate
  • Temporarily handle it by using a dry towel to clean, using the glass drying function and checking and adjusting the cooling system so that the temperature in the cabin does not differ too much from the outside environment, and limit the placement of objects. capable of generating steam.
  • Using a portable dehumidifier on the car reduces the situation of steam and condensation on the car.
  • Limit placing wet items in the cabin without being covered or covered.
  • Open the window down 10-15 cm to balance the temperature or turn on the blower to get the outside wind mode to limit condensation on the surface of the windshield.
  • Turn off the engine and open the door to allow air to circulate and release steam that accumulates in the car if the car has been operated for a long time continuously.
  • Open windows and vents to allow air to circulate and help escape steam when starting the car.
  • Check and clean the air filter as a dirty air filter can block airflow and reduce cooling system efficiency, causing condensation to build up in the vehicle.
  • Check the ventilation holes, make sure they are open and not blocked. If there are any obstacles blocking the airflow, the steam will not escape from the vehicle and lead to condensation on the glass.

Take the above measures but the situation of condensation on the glass when opening the cold in the car still continues, you should take the car to a repair shop to check and handle the problem in time.

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Overcoming the Condition of Vehicle Condensation on the Glass When Cold Opened Premium Garage Thanh Phong Auto Hcm 2024
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Most Frequently Asked Questions

1. Why does turning on the car's air conditioner easily cause condensation?

When the air conditioner is turned on, cold air is emitted from the cooling system, causing the air humidity in the car to increase. If the ventilation system is not working properly, moisture will not escape in time and will condense into water droplets that stick to the glass surface.

2. What air conditioning temperature is appropriate to limit condensation on the glass?

According to experts, an air conditioning temperature between 24-26°C is the appropriate level. The temperature difference between inside and outside the car of 5-7°C will help effectively limit condensation on the glass.

3. Use internal or external air mode to better overcome condensation?

When condensation appears on the glass, you should switch to outside air intake mode (arrow icon). This helps the air in the car to circulate, exchange with the outside, balance humidity and temperature, thereby limiting condensation on the glass.

4. What type of towel should be used to clean glasses when there is condensation?

You should use a soft, dry, clean cloth (preferably a specialized cleaning cloth for car glass) to gently wipe the glass surface. Avoid using wet towels, paper towels or rough materials because they can easily scratch and damage the glass.

5. How does a car dehumidifier work?

Car dehumidifiers use cooling technology or desiccant beads to remove water vapor from the air. This device can automatically turn off when the tank is full of water and light up when it needs to be cleaned or replaced with desiccant beads. Using a dehumidifier helps significantly reduce the humidity in the car, limiting condensation on the glass.

6. Can a dirty car air filter cause condensation on the glass?

That's right, a dirty, clogged air filter will reduce air flow through the air conditioning system. This prevents cold and moisture from escaping, causing condensation on the glass. Therefore, you should clean and replace the air filter periodically as recommended by the manufacturer (usually every 10.000 - 15.000 km). Read the article now to share these Pay attention when changing and maintaining car air filters Safe and effective to help your car always be in the best operating condition.

7. If you park your car in the sun, will turning on the air conditioner immediately when entering the car cause condensation on the glass?

If you park your car in the sun, the temperature inside the car is very high, and the humidity is also high due to evaporation. As soon as you get into the car, immediately turn on the air conditioner. The cold air from the air conditioner will cause the water vapor to condense faster. Therefore, before turning on the air conditioner, you should open the car doors and windows for about 1-2 minutes, then turn on the air conditioner to limit condensation.

9. Can stains and grease on glass cause condensation?

Glass surfaces that are not clean and have stains and grease will absorb moisture better than clean glass. This makes it easier for water vapor to condense and stick longer on the glass. Therefore, you should periodically clean your car windows, especially the windshield, to limit condensation. You can refer to some Common errors of windshield glass and the simplest and most effective solution shared by many experts.

10. How to use some anti-condensation products on car glass?

There are a number of products on the market such as glass covers and anti-condensation films. These products help isolate water vapor and prevent condensation on the glass surface thanks to special coatings. You can clean the glass and apply/stick these products onto the glass surface according to the instructions. However, their effectiveness may not be long-lasting and need to be replaced periodically.

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