Why is the car air conditioning not cooling when the pressure is normal?

[DeAnnie]

The reasons why the car air conditioning is not cooling when the pressure is normal are as follows: 1. Lack of refrigerant: Car air conditioners generally need to be refilled with refrigerant every 2~3 years, and some cars even require it annually. Even if the air conditioning system is tightly sealed, it cannot prevent the refrigerant from escaping, as there might be minor leaks in the air conditioning pipes or condenser. 2. Damage to the air conditioning flap: Although it is relatively rare, failures of the air conditioning flap motor are not uncommon. The flap motor is usually located under the dashboard and serves as the main switch for the air conditioning vents. If it is damaged, it means the switch is broken. Even if the air conditioning can cool the air, the cold air can only escape through gaps. 3. Dirty condenser: It is common to find air conditioning failures during summer. When testing the air conditioning system, no issues are found, and both high and low pressures are basically normal. When taking the car to a 4S shop for repair, the owner is often advised to clean the radiator. The main purpose of cleaning the radiator and condenser is to improve heat dissipation. In spring, willow catkins can stick to the condenser, leading to excessively high engine temperatures or air conditioning failure.