What are the methods to defog the car interior on rainy days?
2 Answers
Methods to defog the car interior on rainy days: 1. For manual air conditioning, turn on the front window defogging mode, set the fan speed to maximum, turn on the AC switch, and then adjust the temperature to the lowest; 2. Some car models are equipped with rear window electric heating and external rearview mirrors, and the fog can be eliminated in about a minute by simply clicking the switch to turn them on; 3. For automatic air conditioning, generally just press the one-touch defrost button, after pressing, the fan speed will automatically turn to maximum and the external circulation will be activated; 4. Use the heating system to defog. If the car has just been started, do not turn on the air conditioning temporarily. Wait until the engine has preheated for a few minutes and the water temperature rises, then start the heating, set the fan speed to maximum, and turn on the front window defogging mode. The fog will disappear in a few minutes.
Fogging inside the car on rainy days is a common issue, and I have several car-system-based solutions to share. First, turn on the air conditioning immediately after starting the engine and switch to the external circulation mode, which can effectively reduce humidity inside the car and clear the fog. Then, press the defogging button—it will automatically adjust the fan to blow air toward the windshield. If the vehicle has an automatic function, preheating the car a few seconds in advance helps it respond faster. The cause of fogging is the large temperature difference inside the car, which leads to water vapor condensing on the cold glass, so balancing the temperature is key. Using cold air for defogging is more efficient, while warm air can also be used in warmer weather—just avoid setting it too high or too low, as this can be counterproductive. During heavy rain, ensure the external windows are clean and regularly clear the wiper grooves to prevent rainwater from worsening the fog. These technical tips will help you maintain clear visibility and drive safely.
