Why is there still hot air coming out when the car air conditioner is turned off?

When the air conditioner of Pacific Auto Network is turned off, there is hot air at the air outlet. The key point is that in order to ensure the air circulation in the cab, the air conditioning system actively switches to the external circulation and foot air supply mode at this time, which is normal.

When the car is running, there is the impact of airflow, which forms positive and negative air pressure outside and inside the car, so the air outside the car will be blown into the car through the external circulation system, forming free convection. Moreover, because the outside air will pass through the engine compartment before entering the car, it will enter the car with the hot air from the engine cooling system and exhaust system, so even if the air conditioner is turned off during driving, the hot air will come in from the air outlet, and the faster the speed, the more obvious the wind. It is normal that there is still hot air in the air outlet after turning off the air conditioner. Just turn off the air conditioner, adjust the temperature of the air conditioner to the lowest, and set the air conditioner to the internal circulation mode.

Car air conditioners that have not been used for a long time generally need to be cleaned once before use; Especially when the air conditioner is stopped in summer, it is necessary to thoroughly clean the automobile air conditioner, such as the evaporator, ventilation duct, air conditioner grille, filter screen and other parts of the automobile air conditioner. It is best to clean the filter screen of automobile air conditioner once a month; The cleaning cycle of the filter can be appropriately adjusted according to the frequency of use and the environment. If the filter element is used for more than 20,000 kilometers, the filtering function of activated carbon in the air conditioning filter element will decrease. At this time, it is best to replace the air conditioning filter, which can save more fuel. ?

(Photo/Text/Photo: Pacific Auto Network Li Shuiqing)