What to Do When the Car Windows Fog Up with Air Conditioning On Indoors?
3 Answers
Open the driver's side door. Step on the brake pedal. Press the one-touch start button to start the engine. Press the AUTO button on the air conditioning system to turn it on. Turn on the defogging switch of the air conditioning.
A few days ago, I turned on the AC while driving, and the windshield suddenly fogged up, making it hard to see the road. It gave me quite a scare. Fogging mainly happens because of the big temperature difference between the hot outside and cold inside, causing moisture in the air to condense on the glass. Handling it is pretty simple: First, press the defog button in your car—the one with the fan blowing on the windshield icon—it automatically increases the airflow and temperature toward the windows. If there's no button, manually turn up the AC fan speed, lower the temperature a few degrees, and switch to the outside air circulation mode to bring in dry air. Don't just blast cold air; recirculation mode makes the air more humid and prone to fogging. Also, wipe the inside of the glass with a clean cloth to keep it clean and prevent fogging. For prevention, warm up the car for a few minutes before driving to balance the inside and outside temperatures, or regularly apply anti-fog spray. Remember, never risk driving with fogged-up windows—pull over, fix the issue, and then go. Safety first.
As a homemaker who drives frequently, I often encounter fogging issues with the air conditioning and have found some tricks through experience. Fogging on the windshield occurs due to condensation from the clash of hot and cold air, especially on rainy days. My method is to immediately turn on the defogging function—most cars have that button, and pressing it activates the fan to blow hard on the windshield, quickly clearing the fog. If there's no button, don’t panic—just increase the fan speed to maximum, direct it toward the front windshield, set the temperature slightly higher (around 26°C), and switch to external air circulation to bring in fresh air. I usually keep a dry cloth or microfiber towel in the car for a quick wipe when needed. On humid days, I crack the window slightly to let in some air. For long-term prevention? Avoid leaving damp items like umbrellas or clothes in the car, and turn off the AC and ventilate before parking. If the fog is heavy, wait for it to clear before driving—never drive with obscured vision, as it can lead to accidents.
