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What are the reasons for slow car cooling and insufficient coldness?

1 Answers
StMaya
07/30/25 7:44am
Here are the reasons for slow car cooling and insufficient coldness: 1. Insufficient refrigerant due to low refrigerant levels: The main cause of insufficient refrigerant is usually minor leaks in the system. If there is not enough refrigerant in the air conditioning system, the amount of refrigerant sprayed into the evaporator from the expansion valve will also decrease. As a result, when the refrigerant evaporates in the evaporator, the amount of heat absorbed will decrease, leading to reduced cooling capacity. 2. Presence of water in the air conditioning system: Moisture infiltration in the air conditioning refrigeration system can cause insufficient cooling. There is a component in the refrigeration system called the dryer (or receiver-drier), and one of its main functions is to absorb moisture from the refrigerant to prevent excessive water content in the refrigerant, which would reduce the cooling capacity.
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What does the AC button on the car air conditioner mean?

AC in the car air conditioner is the air conditioning cooling switch, which is the power switch for the air conditioning compressor. When the AC button is pressed, the compressor of the car air conditioner will start working, and the air blown out by the blower will be cold. After pressing the AC switch, the electromagnetic clutch of the air conditioning compressor will engage, causing the compressor to operate, and the car air conditioner will enter the cooling mode. More information about automatic air conditioning is as follows: 1. Function: The automatic air conditioner will automatically adjust the interior temperature based on the temperature difference between the inside and outside of the car. 2. Precautions: When using the air conditioner for heating in winter, the A/C light being on does not help with heating at all; instead, it will cause unnecessary power loss due to the operation of the compressor.
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What Are the Items for the Second Car Maintenance?

Generally, during the second maintenance of a car, the main items include changing the engine oil, replacing the oil filter, replacing the air filter, and replacing the cabin air filter. Car maintenance is actually quite simple, primarily involving the replacement of various fluids and wear-prone components. More details about car maintenance are as follows: 1. There are many types of fluids in a car: These include engine oil, coolant, brake fluid, power steering fluid, and transmission fluid. 2. Wear-prone components in a car: These include belts, various filters, wiper blades, tires, brake pads, brake discs, spark plugs, and ignition coils. 3. Maintenance advice: During maintenance, it's essential to replace fluids and wear-prone components and also inspect other wear-prone parts. It is recommended to measure the moisture content of the brake fluid during each maintenance service, as brake fluid is highly prone to absorbing water.
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Does the BMW 5 Series belong to Class B or Class C vehicles?

The BMW 5 Series belongs to Class C vehicles. Class C vehicles typically have a wheelbase ranging from approximately 2.8 to 3.3 meters, with engine displacements generally between 2.4 to 3.5 liters. Representative models include the Audi A6L, BMW 5 Series, Mercedes-Benz E-Class, Hongqi H7, Toyota Crown, Buick Park Avenue, as well as some imported models. Below is an introduction to the classifications of sedan vehicles (A, B, C, D, E) based on their dimensions: 1. Class A: Class A vehicles have a wheelbase ranging from 2.5 to 2.7 meters and engine displacements from 1.5 to 2.0 liters, such as the Ford Focus, Volkswagen Sagitar, Toyota Corolla, and Audi A3. Class A vehicles are the most widely used family cars in China. 2. Class B: Class B mid-size sedans have a wheelbase between 2.7 and 2.9 meters, with engine displacements ranging from 1.8 to 2.5 liters. The Class B sedan market has gradually become the main battleground for domestic automakers. Models like the Hyundai Sonata, Audi A4, Volkswagen Passat, and Toyota Camry belong to the Class B category. 3. Class C: Class C premium sedans have a wheelbase between 2.8 and 3.0 meters, with engine displacements from 2.3 to 3.0 liters. The most renowned Class C sedans in China include the Audi A6, BMW 5 Series, and Mercedes-Benz E-Class. 4. Class D: Class D luxury sedans feature stylish exteriors, spacious interiors, and powerful performance. They typically have a wheelbase exceeding 2.8 meters and engine displacements above 3.0 liters. Common Class D models include the Mercedes-Benz S-Class, BMW 7 Series, and Audi A8. 5. Class E: Class E vehicles have a wheelbase greater than 2.80 meters and engine displacements above 3.0 liters, with numerous models available, such as the BMW 7 Series and Mercedes-Benz S-Class.
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What is the Difference Between Mild Hybrid and Hybrid Electric Vehicles?

Mild hybrid and hybrid electric vehicles differ in their working principles, resulting in varying fuel consumption. The specific details are as follows: 1. Mild hybrid, also known as MHEV, commonly refers to the 48V mild hybrid system. As the name suggests, 48V increases the original 12V voltage by four times, enabling it to easily power higher-wattage onboard electrical equipment. This allows high-power devices such as the steering system, starter motor, and air conditioning to continue operating even when the engine is turned off. 2. Hybrid electric vehicles add one or more drive motors to the traditional combustion engine. These motors not only assist the engine in generating stronger power but can also independently drive the vehicle under fixed conditions like low speeds or constant cruising. Particularly in congested urban environments, hybrid electric vehicles demonstrate significant fuel-saving effects.
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What is the HOLD function in a car?

In automatic transmission vehicles, the full name of HOLD is AUTO-HOLD, which is a very practical automatic parking function. When waiting at a red light and needing to stop briefly, the vehicle will automatically brake the wheels after coming to a complete stop to prevent rolling. When parking on a slope, the system will automatically brake the wheels. Once the vehicle's power is sufficient—that is, when the driving force exceeds the rolling resistance—the wheels will be automatically released, allowing the vehicle to continue moving forward. After starting the car, press the HOLD button, and the HOLD indicator on the dashboard will light up, indicating that the automatic parking system is activated. During driving, when you need to stop, press the brake pedal until the vehicle comes to a halt. The HOLD indicator will light up on the screen, and you can release the brake pedal while the vehicle remains in the braking state. When you need to resume driving, simply tap the accelerator pedal lightly to release the braking function. This avoids the need to use the handbrake or electronic parking brake and simplifies the frequent shifting between D to N or D to P.
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Which Direction Should the Airflow Arrow on the Cabin Air Filter Face?

Airflow refers to the direction of air movement. There is an arrow next to the airflow indicator on the car's cabin air filter. During installation, it's crucial to determine whether the arrow should point upward or downward. If you're replacing the cabin air filter yourself, you can refer to the owner's manual, which will specify whether the airflow arrow should face up or down. More information about cabin air filters is as follows: 1. Function: The cabin air filter is an important component of a car's air conditioning system. It filters the air to protect the health of passengers. Without it, the air inside the car would become very polluted when the external circulation is activated. The cabin air filter acts like a mask for your car. 2. Precautions: The cabin air filter is a component that requires regular replacement. If not changed for a long time, it can negatively affect passengers' health. It is recommended to replace the cabin air filter periodically.
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