What Causes the Car AC to Not Cool When Not Accelerating?

1 Answers
StOmar
07/30/25 4:53am
When the car AC fails to cool while not accelerating, it may be due to poor heat dissipation from the condenser, leading to reduced cooling efficiency. You can try washing the condenser with water during car washing or take it to a quick repair shop to blow the condenser with an air pressure gun. It's also advisable to check the refrigerant pressure. Below are the functions of a car AC system: 1. Temperature Regulation: This is the primary function of a car AC. In summer, the cooling system generates cold air to lower the cabin temperature; in winter, except for large commercial vehicles that use independent combustion heaters, most vehicles utilize residual heat from the engine for heating. 2. Humidity Regulation: Humidity significantly affects passenger comfort. The cabin humidity should generally be maintained between 30% and 70%. Standard car AC systems do not regulate humidity; this is only possible with ventilation systems or advanced luxury cars equipped with integrated heating and cooling AC units. 3. Airflow Regulation: The speed and direction of airflow greatly influence comfort. If air is blowing directly, the speed should be limited to a certain range when the temperature is appropriate. The airflow speed can be adjusted based on passengers' living environment, age, health, and temperature preferences. 4. Air Purification: The quality of cabin air is crucial for comfort.
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