Why is there no cold air in the car?

[Kate]

There are several reasons why a car's air conditioning may not produce cold air: 1. Dirty condenser: The main purpose of the condenser is heat dissipation. If the condenser is too dirty, it can cause the engine temperature to rise too high, resulting in insufficient cold air. 2. Insufficient refrigerant: Refrigerant acts as the cooling agent. When there's not enough refrigerant, there naturally won't be any cold air. 3. Component failure: Damage to the air conditioning compressor, throttle valve, or expansion valve. The functions of car air conditioning include: 1. Temperature regulation: This is the primary function of car air conditioning. In summer, the cooling system produces cold air to lower the temperature inside the vehicle; 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 humidity inside the vehicle should generally be maintained between 30% and 70%. Standard car air conditioning systems don't have humidity control functions, which can only be achieved through ventilation systems or the advanced integrated heating/cooling systems found in luxury vehicles.