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What Causes Abnormal Noises in the Air Conditioning System?

1 Answers

McMadeline

07/30/25 6:40am

There are many reasons for abnormal noises in a car's air conditioning system. Below is a detailed analysis of the specific causes: 1. Abnormal noise from the car's air conditioning compressor: As a high-speed rotating component, the air conditioning compressor has a relatively high probability of failure, with abnormal noise being a common issue. There are many reasons for compressor noise, such as damage to the compressor's electromagnetic clutch or severe internal wear. 2. The compressor's electromagnetic clutch is a common source of abnormal noise: The compressor frequently operates under high loads, transitioning from low to high speeds, which places high demands on the electromagnetic clutch. Additionally, the clutch is usually installed close to the ground and often exposed to rain and dirt. When the bearings inside the electromagnetic clutch are damaged, abnormal noise occurs. 3. The tension of the compressor's drive belt also directly affects the lifespan of the electromagnetic clutch: If the belt is too loose, the clutch may slip; if it's too tight, the load on the clutch increases. Improper belt tension can lead to the compressor not working properly or even cause damage. If the compressor pulley and generator pulley are not aligned, it can reduce the lifespan of the belt or compressor. 4. Repeated engagement of the electromagnetic clutch can also cause abnormal noise in the compressor: For example, insufficient generator output, excessive pressure in the air conditioning system, or excessive engine load can all lead to repeated clutch engagement.

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When will Beijing's China 5 vehicles no longer be eligible for registration?

After July 1, 2019, Beijing has implemented the China 6 standard, and new China 5 vehicles in Beijing can no longer be registered. The following is an introduction to the implementation of China 6: Official implementation of the China 6 policy: The China 6 motor vehicle pollutant emission standard refers to the standard formulated to implement the Air Pollution Prevention and Control Law of the People's Republic of China, prevent and control the environmental pollution caused by the exhaust of compression ignition and gas fuel ignition engine vehicles, protect the ecological environment, and safeguard human health. Differences between China 5 and China 6: The emission standards are different, with China 6 being more than 30% stricter than China 5. Excluding the influence of working conditions and testing, gasoline vehicles' carbon monoxide emissions are reduced by 50%, total hydrocarbon and non-methane hydrocarbon emissions are reduced by 50%, and nitrogen oxide emissions are reduced by 42%. The principles are different: during the China 5 stage, diesel vehicles and gasoline vehicles had different emission standards, but China 6 adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type used.

Do Automatic Cars Have a Clutch?

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What Are the Blind Spots When Driving a Car?

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How to Read the Gauge on an Air Conditioning Refrigerant Pressure Meter?

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How to Classify Engine Oil Grades?

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