What to Do When the Outside of the Windshield Fogs Up with the AC On?

1 Answers
SanJanelle
07/29/25 11:15am
Fogging on the outside of the windshield when the AC is on is caused by a significant temperature difference between the interior and exterior of the vehicle under current conditions. The following methods can help resolve the issue: 1. Open windows for air circulation: Crack open both side windows slightly to allow air to circulate inside the car. When the interior temperature approaches the exterior temperature, the fog will dissipate. 2. Use the AC defogging function: Press the A/C button (which stands for air conditioning cooling), lower the temperature, turn on the windshield defogging button, and set the fan speed to maximum. As the moisture on the windshield evaporates, the glass temperature will drop quickly, effectively removing the fog. 3. Use a defogging spray: The principle of defogging sprays is to apply a protective film on the windshield, which helps prevent fogging.
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