How to Turn on Car Air Conditioning in Winter Without Fogging?

[VanMolly]

Here are methods to prevent window fogging when using air conditioning in winter: 1. After starting the vehicle, allow the engine coolant temperature to rise. 2. Turn on the air conditioning. 3. Activate the blower and set the fan speed to level 2 or 3. 4. Rotate the temperature knob to the red zone to enable warm air heating, then adjust the knob to direct airflow upward toward the windshield to raise its temperature. 5. Adjust the air vents to blow toward the side windows, which can reduce fogging on other glass surfaces. Extended information on activating rear air conditioning: 1. When the air conditioning is turned on via the central console, the rear air conditioning automatically activates. 2. There is a knob at the rear air vent—rotate it to the ON position. 3. This knob controls both the airflow volume and the on/off function for the rear air conditioning system.

[AubreeMarie]

I've been driving for over thirty years, and every winter, defogging becomes a must-do task. Before getting in the car, I always clear the frost and snow off the outside of the windows to prevent rapid fogging due to temperature differences. After starting the engine, the first thing I do is turn on the air conditioning, but I don’t immediately set it to high heat. I first turn on the external circulation with the fan at medium speed, directing it at the windshield for about two minutes to remove moisture from the cabin. Then, I switch to AUTO mode or set the temperature around 20°C, with the airflow directed upward or using the defogging function. The air conditioning compressor helps dehumidify, making fog prevention highly effective. If fog has already formed, I increase the fan speed and use the wipers to clean the windshield. Remember, don’t leave wet items like umbrellas or damp clothes in the car when parked, as they can increase humidity. If the air conditioning isn’t working well, check if the filter is dirty and replace it promptly. Safe driving is no joke—once, I rushed and didn’t follow these steps properly, nearly causing an accident, so now it’s a habit.