What Causes the Sound of Boiling Water When the Car Air Conditioner is On?
2 Answers
When the car air conditioner is turned on, you may hear a water sound. This sound is produced as water passes through the heater core. Check if the engine coolant is low. In such cases, you can add antifreeze, rev the engine to high speed, and expel any trapped air. Additional Information: 1. Function of Car Air Conditioning: It adjusts and controls the temperature, humidity, air cleanliness, and airflow inside the car cabin to the optimal state, providing a comfortable environment for passengers and reducing travel fatigue. It also creates favorable working conditions for the driver and plays a crucial role in ensuring safe driving. Generally, it includes refrigeration, heating, and ventilation systems. This integrated system makes full use of the limited space inside the car, featuring a simple structure and easy operation, making it a popular modern car air conditioning system internationally. 2. Components of Car Air Conditioning: It mainly consists of the compressor, electronic control clutch, condenser, evaporator, expansion valve, receiver-drier, pipes, condenser fan, vacuum solenoid valve, idle speed controller, and control system. The car air conditioning system is divided into high-pressure and low-pressure lines. The high-pressure side includes the compressor output side, high-pressure lines, condenser, receiver-drier, and liquid lines; the low-pressure side includes the evaporator, accumulator, return lines, compressor input side, and compressor oil sump.
Hearing a boiling water sound when turning on the AC? I've seen this quite often during car repairs. It's usually the normal sound of refrigerant flowing through the system, especially when the AC is first turned on. As the condenser or evaporator cools and the liquid refrigerant evaporates into gas, it can produce a boiling-like sound. However, if the sound is particularly loud or continuous, be cautious—it might indicate a blocked evaporator drain hole, where rainwater or condensation accumulates and can't drain, causing a gurgling noise. Also, check if there are any leaks in the AC lines, as air mixing into the refrigerant system can amplify the noise. If the AC cooling performance worsens along with the noise, don't delay—head to a 4S shop or repair center promptly to avoid minor issues turning into costly repairs. Safety first when driving, and regular AC maintenance can prevent problems before they arise.
