Why can I hear water sounds when the car's air conditioning is on?

[DiCecilia]

Hearing water sounds when the car's air conditioning is on is caused by water passing through the heater core. Check if the engine coolant is low. In this situation, you can first add antifreeze, then press the accelerator pedal twice to let the engine run at high speed, which helps expel air from the system. The car air conditioning system is designed to regulate and control the temperature, humidity, air cleanliness, and airflow inside the vehicle cabin, providing a comfortable environment for passengers and reducing travel fatigue. A car air conditioning system generally consists of components such as the compressor, electronically controlled clutch, condenser, evaporator, expansion valve, receiver-drier, pipelines, condenser fan, vacuum solenoid valve, idle speed controller, and control system.