Why does Nissan Yida have so many air conditioners? The water flow air conditioner in our department is very cool.

According to the above-mentioned vehicle condition and age, it is recommended that you go to the repair shop to check whether the fluorine pressure is within the standard range. If there is air in the air conditioning system, the pressure will be normal, but the cooling effect will be greatly reduced. The principle of the air conditioning system is as follows: the air conditioner of the car is powered by the engine, and the engine does not need to increase the speed to increase the power without turning on the air conditioner. After the air conditioner is turned on, it will provide signals to the engine controller (that is, ecu) according to the idle speed lifting device to increase the engine speed, so as to obtain enough power to ensure the normal operation of the air conditioning system. First of all, check the parts, mainly to check the heat dissipation of the condenser, whether there are stolen goods or sundries. According to the principle and performance of the air conditioner, check the ventilation of the air conditioner filter, that is, every time the ignition switch is turned on/off, the air conditioner control system will be automatically set to the external circulation state, and the air conditioner filter will be blocked due to the external environment. The correct detection method of air outlet temperature is: close the door, open the window and open the engine cover. The temperature is set in the coldest state, blowing before, circulating internally and idling the engine. When the air outlet temperature is lower than 7℃, the refrigeration is normal. Therefore, I suggest you go to the repair shop to do the following inspections: 1, refrigerant pressure test; 2. Whether the condenser is clean; 3. Evaporator ventilation inspection and cleaning;