How to Use the Heater in Winter Without Fogging Up the Windows?
2 Answers
Methods to use the heater in winter without fogging up the windows include: 1. Open both windows to allow air convection and eliminate temperature differences; 2. Turn on the air conditioner with both cold and hot air; 3. Use defogging agents; 4. Wipe the glass with soapy water; 5. Dry the fog with a towel. The reasons for window fogging when using the heater in winter are: 1. Large temperature difference between the inside and outside of the car; 2. The window temperature is lower than the dew point temperature; 3. There is a temperature difference on both sides of the window. The heater utilizes the internal heat cycle of the car and does not require the air conditioning compressor to be activated. To use the heater, simply adjust the air conditioning button. When the car starts, the engine begins to warm up. Wait until the engine temperature gauge points to the middle position, then turn on the heater. At the same time, set the air circulation to external circulation to expel the cold air inside the car, and then switch the air circulation to internal circulation.
I always use a few tricks to prevent the heater from fogging up in winter. Don’t immediately blast high-temperature warm air as soon as you get in the car—it’s prone to fogging, which can dangerously obstruct your view. Instead, I first open the windows for about half a minute to balance the temperature difference, then start the engine with the key and switch to external circulation mode, using medium fan speed for a few minutes to draw out the moisture. Then, gradually increase the temperature to a comfortable level around 20°C, keeping the airflow moderate and directing it slightly downward toward the windshield. If fog does appear, don’t panic—just press the defrost button and let the high-speed air blow for a few moments to quickly clear it. Regularly clean the inside and outside of your windows and apply an anti-fog spray to reduce condensation—it works great. For cars with automatic climate control, it’s even easier: just press AUTO and set the temperature, and the system intelligently manages humidity and airflow, making it hassle-free and safer with fewer mistakes. Make it a habit to occasionally switch to internal circulation for short periods to retain heat, but don’t leave it on too long to prevent moisture buildup. Remember these tips, and you’ll drive safely with a clear view.
