What Causes One Side of Car Air Vents to Blow Cold Air While the Other Side Blows Hot Air?
1 Answers
The reasons for one side of car air vents blowing cold air while the other side blows hot air are as follows: Insufficient refrigerant: A common cause of temperature differences between the two sides of the air vents is insufficient refrigerant. When refrigerant is insufficient, the evaporation and heat absorption process of the liquid refrigerant entering the evaporator ends quickly, causing the evaporator to absorb heat and cool on the side where the refrigerant flows in, while there is no heat absorption on the side where the refrigerant flows out. As a result, only a small portion of the airflow sent by the blower is cooled, leading to temperature differences between the air from the two vents. By measuring the pressure in the high and low-pressure lines of the air conditioning system, you can determine if there is a refrigerant shortage, and adding refrigerant can resolve the issue. Low efficiency of the air conditioning compressor: If the air conditioning compressor is malfunctioning and operating at low efficiency, the liquefaction of the refrigerant will be insufficient. In this state, the refrigerant entering the evaporator will also have severely reduced heat absorption efficiency, leading to poor cooling performance, ultimately resulting in the airflow temperature from the vents failing to meet standards. Dirty condenser and evaporator: If the car air conditioning system is not cleaned for a long time, the condenser and evaporator can become covered with dust, lint, and other debris, weakening the refrigerant's effectiveness or reducing the heat absorption efficiency during the refrigerant's state changes. This prevents the air from being adequately cooled, ultimately causing temperature differences in the airflow from the various air vents.
