What happens if a car's air conditioning system lacks refrigerant?

[JaceDella]

If the air conditioning system lacks refrigerant, it will result in ineffective cooling and reduced airflow. Below is an introduction to refrigerant: 1. Characteristics: Refrigerant typically does not decrease with prolonged use. However, there may be cases where unscrupulous repair technicians tamper with the system—intentionally closing valves during disassembly or maintenance—and then claim that the refrigerant has naturally depleted or leaked, requiring a refill for profit. 2. Principle: The refrigerant in the air conditioning system is generally in a closed-loop cycle. If there are no leaks, the refrigerant level will not decrease over time. Many air conditioning systems that have been in use for 10 years without any refrigerant top-ups still maintain excellent cooling performance. Moreover, more refrigerant is not necessarily better. Overcharging can increase the compressor's load, causing the system to shut down automatically or even damage the compressor.