Why Is Cold Air Coming Out When the Car Air Conditioner Is Off?

1 Answers
ClaytonMarie
07/29/25 9:16pm
During summer, the temperature inside the car naturally becomes very high, so turning on the air conditioner immediately after getting in the car becomes a common practice. After setting the air conditioner to a low-temperature mode and feeling that the interior temperature has become comfortable, you may choose to turn off the air conditioner while keeping the external circulation on. At this point, you might still feel cold air blowing, while the air outside remains hot. The details are as follows: 1. Reason: The most common cause of this phenomenon is the excessively low temperature of the evaporator inside the air conditioner. This situation does not last very long. Over time, the temperature of the evaporator gradually rises, and the cold air eventually turns into normal-temperature air. 2. Cooling process: Compression - Condensation - Throttling - Heat absorption. These four cycles repeat to form the air conditioner's cooling process. The air conditioner's evaporator undergoes a heat absorption process, where liquid refrigerant enters the evaporator. At this point, the refrigerant's temperature is lower than that of the evaporator, causing the evaporator to evaporate and absorb heat, thereby removing heat from the air to achieve cooling. The absorbed hot air is then discharged outside.
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