What Causes the Noise in the Car's Air Conditioning Expansion Valve?

[SanRonan]

The reason for the noise in the car's air conditioning expansion valve is that the expansion valve is blocked. Below is an introduction to the causes of air conditioning not cooling: 1. Internal damage: Severe internal wear of the compressor leads to its inability to function properly. 2. Oil stains: The presence of oil stains at connections or seams indicates refrigerant leakage, requiring reinforcement or replacement of related parts. 3. Circuit system failure: Circuit system failures causing the car's air conditioning compressor to malfunction are also very common. You can check if the circuit is unobstructed, inspect the temperature sensor solenoid valve, and other potential fault causes. 4. Low-pressure gauge reading much lower than normal: The surface temperature of the compressor suction pipe is lower than normal, appearing damp and cold (commonly known as sweating).