Why does the Subaru air conditioner sometimes blow cold and sometimes not?

[ParkerLee]

Here are the reasons why the Subaru air conditioner sometimes blows cold and sometimes not: 1. Lack of refrigerant: When there is insufficient refrigerant in the car's air conditioning pipes, the pressure in the pipes decreases, and the amount of heat removed also decreases. This gives the impression that the air conditioner is not blowing cold air. Therefore, it is essential to regularly check the refrigerant pressure during routine maintenance to avoid leaks or insufficient pressure. 2. Dirty condenser: The main function of cleaning the radiator and condenser is heat dissipation. In spring, poplar catkins or dust from smog can accumulate on the condenser, leading to excessive engine temperature or poor air conditioning performance. 3. Loose air conditioning compressor belt: Due to aging of the compressor belt, the compressor may slip during operation, reducing efficiency, lowering the rotation speed, and impairing the proper circulation of refrigerant. In this case, the compressor belt should be tightened. If the aging is too severe, it is recommended to go directly to a professional repair shop to replace the belt. 4. Air in the air conditioning pipes: If air enters the car's air conditioning system during operation, it will affect the circulation of the refrigerant, significantly reducing the cooling effect. The main cause of such problems is often the incomplete removal of air during the repair process.