Do You Need to Turn on A/C for Defogging in Winter?
2 Answers
No, A/C is the cooling mode of the car air conditioning. Turning on the heater is sufficient for defogging. More information about the A/C button is as follows: 1. "AC" is the abbreviation of "Airconditioning" in English, which refers to the air conditioning device. 2. The A/C button is the switch for the air conditioning compressor. In summer, you must turn on the A/C button to activate the cooling mode. 3. The heater only utilizes the internal heat circulation of the car and does not require the air conditioning compressor to be activated. 4. On sunny winter days, you should turn off the A/C button. On rainy or snowy days, you can turn on the A/C button or switch between internal and external circulation, but turning on the A/C button will increase fuel consumption and reduce power.
For defogging while driving in winter, having driven for almost twenty years, I've always found turning on the A/C quite effective. Especially on cold days, when the windows fog up, just using the heater sometimes isn't enough. The heater can be too drying, making the fog thicker or causing it to condense faster. With the A/C on, the air compressor can remove moisture from the air. Although the air blown out is a bit cooler, once the warm air kicks in, the fog on the windshield clears much faster. I've tried not using the A/C before, and the fog was so thick that I had to wipe it off for a long time, which was dangerous and could even scratch the glass. Now, I've developed the habit of turning on the A/C first and then adjusting the heater as soon as I get in the car. Aiming it at the windows for a minute or two clears them right up. It's also important to adjust the vents properly to avoid blowing directly on your hands or face, so you don't get too cold in winter. A car is a tool, and safety comes first. This little habit can help prevent accidents.
