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What Causes a Car Fan Not to Spin?

1 Answers
MacIris
07/30/25 7:29am
Reasons why a car fan does not spin: 1. The water temperature has not reached the required level: Most car radiator fans nowadays operate using electronic temperature control, so the fan will only start spinning normally when the water temperature inside the car reaches the required level. If the temperature is too low, the radiator fan will not spin. Therefore, if the car radiator fan is not spinning, the first thing to check is whether the water temperature has reached the required level. 2. Relay failure: If the water temperature meets the requirements but the car radiator fan still does not work, the issue might be with the fan relay. If the relay is faulty, the car's radiator fan will not operate. 3. Temperature control switch problem: If there are no issues with the above two aspects, then the temperature control switch should be checked. Sometimes, faults can occur here, which can also affect the operation of the car radiator fan, so it is important to inspect this as well.
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Can I take the Subject 1 exam if my ID card has expired?

If your ID card has expired when taking the Subject 1 exam, you can apply for a temporary ID card. A temporary ID card has the same validity as a formal ID card. Electronic ID cards cannot be used for the exam. The "Regulations on the Application and Use of Motor Vehicle Driving Licenses" clearly stipulates that the Subject 1 exam can be taken twice on the same day. If you fail the first attempt, you can take a free second attempt. If you fail the second attempt, the Subject 1 exam will be terminated, and you can only reschedule the exam after ten days. The Subject 1 exam consists of 100 questions, divided into single-choice questions and true/false questions, with each question worth 1 point and a total score of 100. If you answer 11 questions incorrectly during the exam, the system will automatically submit the test and end the exam. The Subject 1 exam is computer-based and lasts for 45 minutes. Subject 1 exam content: Regulations on driving licenses and motor vehicle management; Road traffic conditions and regulations; Road traffic safety violations and penalties; Regulations on road traffic accident handling; Basic knowledge of motor vehicles; Local regulations; Knowledge of braking systems and safety devices for large and medium-sized passenger and freight vehicles; Special knowledge for wheeled self-propelled machinery, trams, and trolleybuses. Subject 1 exam precautions: During the exam, candidates should pay attention to their attire—no slippers are allowed, and electronic devices and bags are prohibited in the exam room. Bring your ID card and queue to enter the waiting hall. Observe the precautions and procedures on the large screen, and store personal belongings in a locker before entering the exam room. Upon entering the exam room, the identity verification station will assign a seat. After finding your seat, begin the exam. Ensure the camera is aligned with you and follow exam discipline. If you fail the first attempt, you can retake the exam on the same day. If you fail again, you will need to pay to reschedule. After the exam, queue to collect your score report and sign it. Failure to sign will render the result invalid. There is no limit to the number of times you can reschedule the Subject 1 exam. Each subject can be taken once, and if you fail, you can retake it once. If you do not take the retest or fail the retest, the exam will be terminated, and the applicant must reschedule. For Subject 2 and Subject 3, there are only five exam attempts. Subject 2 and Subject 3 exams can be rescheduled after ten days. If you fail the Subject 3 safe driving knowledge test, the previously passed road driving skills test results remain valid. There are three subjects in the driving test: Subject 1, Subject 2, and Subject 3. Subject 1 refers to the exam on road traffic safety laws, regulations, and related knowledge; Subject 2 refers to the field driving skills exam; Subject 3 is divided into two parts: road driving skills and safe driving knowledge. The safe driving knowledge test is conducted after Subject 3, so it is commonly referred to as Subject 4. However, in official terms (i.e., the Ministry of Public Security's Order No. 123), there is no such thing as Subject 4.
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Will the BMW 340 be imported?

The BMW 340 is an imported model from BMW. The BMW 340 is a short-wheelbase sedan, equipped with a 3.0T turbocharged engine. The engine features a six-cylinder layout, with a maximum power output of 240kW and a maximum torque of 450Nm. It is paired with an 8-speed automatic transmission from ZF, with the model code upgraded from 8HP45 to 8HP50. The BMW 340 is a four-door, five-seater sedan with a body structure measuring 4650mm in length, 1811mm in width, and 1460mm in height, and a wheelbase of 2810mm.
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What is the Hill Start Assist Function in Cars?

Car hill start assist function prevents vehicle rollback by applying braking force to all four wheels through the system, effectively reducing the risk of rolling accidents during hill parking. Simply put, when starting on an uphill slope, the vehicle can automatically apply brakes to prevent rollback. Developed as an extension of the ESP system, hill start assist enables the vehicle to maintain braking for several seconds after the driver's right foot leaves the brake pedal during hill starts without using the handbrake. This allows the driver to smoothly transition their foot from the brake pedal to the accelerator pedal, preventing accidents caused by vehicle rollback.
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Which country does Li Auto belong to?

Li Auto is a Chinese brand, a new energy vehicle company founded by Li Xiang in July 2015. Taking the 2020 Li ONE as an example, its body dimensions are: length 5020mm, width 1960mm, height 1760mm, wheelbase 2935mm, fuel tank capacity 45l, and curb weight 2300kg. The 2020 Li ONE features a MacPherson independent front suspension and a multi-link independent rear suspension. It is equipped with a 1.2L turbocharged engine, delivering a maximum horsepower of 131PS and a maximum power of 96kW, paired with a fixed gear ratio transmission.
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Why Does a Car Generator Make Abnormal Noises?

Causes of abnormal noises in a car generator include motor bearings, belts, and brushes. Below is an analysis of different causes: 1. It is usually the bearing making noise, or the bearing is damaged, causing the rotor and stator to rub against each other; or it could be due to a loose generator fan blade. If the bearing is noisy or damaged, it can be replaced. 2. If the car generator's belt is making noise, it is recommended to inspect it first. The belt noise could be due to being too tight or too loose. If the issue cannot be resolved, the belt should be replaced. Do not wait until the problem worsens before checking, as it may affect the driver's normal operation of the vehicle.
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What brand is Rexroth?

Rexroth is Bosch Rexroth, with the full name Bosch-Rexroth, a world-renowned brand. Here is some relevant information about Bosch Rexroth: 1. Mobile Machinery Applications: With extensive project experience in machinery applications, engineering, and factory automation, Rexroth has become a reliable partner for local customers in over 80 countries worldwide, producing safer and more efficient machinery to contribute to the rational utilization of natural resources. 2. Industries Involved: Including water conservancy projects, maritime engineering, metallurgy, plastic machinery, general machinery, drilling machines, forklifts, bulldozers, cranes, and other industries, it has one of the largest projects in Asia.
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