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Why is the car's internal circulation light always on?

1 Answers

SophiaRose

07/25/25 3:54am

The light on indicates internal circulation, while the light off indicates external circulation. The purpose of external circulation is to introduce fresh air, while internal circulation is to block out polluted air. Here is some relevant information: 1. Introducing fresh air: Shortly after entering the car, you should open the windows or activate the external circulation ventilation system to bring in fresh air. Do not drive for long periods with the windows and doors closed, and never sleep or rest for extended periods in a sealed car. After purchasing a new car, it is advisable to maximize air exchange between the inside and outside of the car, similar to a newly renovated house, to allow harmful gases inside the car to dissipate as quickly as possible. 2. Avoid prolonged use of internal circulation mode: When using the air conditioning or heating, opt for the air exchange mode between the inside and outside of the car, and try to avoid using the internal circulation mode for extended periods. 3. Adjust the car's air conditioning circulation system promptly: In areas with heavy traffic congestion, temporarily switch the air conditioning or heating to internal circulation mode. For vehicles driving with windows open, temporarily close the windows. Car owners should develop the habit of adjusting the car's air conditioning circulation system in a timely manner based on the outside air conditions.

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How to reset the tire pressure warning light on the 2021 Mazda 3?

To eliminate the tire pressure warning light on the 2021 Mazda 3, simply perform a tire pressure reset. The method for tire pressure reset is as follows: First, turn on the ignition, then press and hold the tire pressure monitoring reset button. After hearing a "beep" sound, release the button. The tire pressure monitoring system will then store the current normal tire pressure data, automatically clear the previous data, and finally, the warning light on the dashboard will turn off, indicating the completion of the tire pressure reset. Tire pressure monitoring automatically checks the tire pressure in real-time while driving and alerts the driver to leaks or low pressure to ensure driving safety. There are generally three reasons for abnormal tire pressure warnings: Abnormal tire pressure: The system typically alerts when pressure is below 1.8 bar or above 3.0 bar. In this case, inspect the tires and adjust the pressure accordingly. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure reset is not performed promptly, the system will continue to display the old data, causing the warning light to stay on. Simply perform a tire pressure reset to resolve this. Damaged tire pressure sensor: The tire pressure sensor, installed inside the tire and connected to the inflation valve, monitors the tire pressure. If the sensor is damaged due to impact while driving, it can trigger the tire pressure warning light. In such cases, the only solution is to replace the sensor with a new one.

Should Minor Scratches on a New Car Be Polished?

Scratches can indeed be removed through polishing. Polishing involves the high-speed rotation of a polishing wheel, which can grind away the oxidized layer and dirt on the car's paint surface, effectively eliminating minor scratches. However, it's important to note the frequency of polishing. Frequent polishing can, to some extent, damage the car's paint. As the paint is continuously ground down, it becomes thinner, reducing the car's ability to maintain itself. Below is additional information on scratch polishing: 1. If a new car develops scratches, polishing is an option, especially for minor scratches. The paint can still withstand it. However, it's recommended to use wax instead, specifically abrasive wax. The special grinding particles in abrasive wax can also remove scratches, and compared to polishing, waxing is less likely to harm the new car's paint and is a more reassuring option. 2. If the scratches are deep and reach the primer or metal layer, the paint should first be repaired. After the paint has fully hardened, a detailed polishing process can be performed. New car paint is of high quality and less prone to oxidation, so regular maintenance is sufficient, and polishing isn't necessary. For older cars, typically after 3-5 years when the paint begins to age, polishing can help restore the paint's shine.

How long is a Lexus car?

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Why was the traffic violation automatically cleared?

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