The reason why there is no refrigeration after replacing the air conditioning filter screen is the operation error:

　　1、空調開關不開:你要知道空調開關是空調，有些新車車主很可能會犯這樣的錯誤。

　　1. Air conditioning switch does not open: you need to know that the air conditioning switch is air conditioning, some new car owners are likely to make such a mistake.

　　2. 出風口關閉或風向不對:首先要確保出風口是開著的，沒有異物堵住出風口。另外，你應該知道出風口的風向調節。

　　2. The air outlet is closed or the wind direction is wrong: first, make sure that the air outlet is open and there is no foreign matter blocking the air outlet. In addition, you should know the wind direction regulation of the air outlet.

　　3.天氣炎熱時的外循環:此時，外循環無疑會導致熱空氣從外面進入車內，空調的制冷效果自然會變差。因此，在天氣炎熱、無特殊情況下，應盡量采用內循環方式。

　　3. External circulation in hot weather: at this time, the external circulation will undoubtedly cause hot air to enter the car from the outside, and the cooling effect of the air conditioner will naturally become worse. Therefore, in the hot weather, without special circumstances, we should try to use internal circulation.

　　4. 當汽車處于高溫狀態時，打開空調:特別是長時間暴露在烈日下的車輛，記得先打開窗戶讓熱空氣出去，然后再打開空調。

　　4. When the car is in a high temperature state, turn on the air conditioner: especially for the car exposed to the hot sun for a long time, remember to open the window first to let the hot air out, and then turn on the air conditioner.

　　5、室外溫度過低，導致空調不工作

　　5. The outdoor temperature is too low, resulting in the air conditioner not working

　　不制冷解決方案:

　　Uncooled solution:

　　1.選擇正常的維修店和正常的產品，濾網堵塞時，就必須選擇合格的制冷劑進行維修，合格的制冷劑在汽車空調中起到了關鍵的作用。

　　1. Select normal maintenance shop and normal products. When the filter screen is blocked, qualified refrigerant must be selected for maintenance. Qualified refrigerant plays a key role in automobile air conditioning.

　　2.有時汽車空調中的制冷劑不足或太少，會導致汽車空調制冷失效，而汽車空調不足的原因大多是由于系統中制冷劑的少量泄漏造成的。

　　2. Sometimes the refrigerant in the air conditioner is insufficient or too little, which will lead to the refrigeration failure of the air conditioner, and most of the reasons for the lack of the air conditioner are caused by a small amount of refrigerant leakage in the system.

　　3.在整個汽車空調系統中，冰箱中制冷劑和機油過量也會導致汽車空調過濾網堵塞，導致汽車空調不制冷。它的阻力會增大，制冷劑到膨脹閥的流量也會減小，導致制冷量不足。

　　3. In the whole automobile air conditioning system, too much refrigerant and oil in the refrigerator will also cause the filter screen of the automobile air conditioning to be blocked, which will cause the automobile air conditioning not to refrigerate. Its resistance will increase, and the flow of refrigerant to the expansion valve will decrease, resulting in insufficient cooling capacity.

　　4.汽車空調壓縮機的傳動皮帶松了,壓縮機工作時將滑動,導致傳輸效率的降低,減少壓縮機的轉速,和輸送壓縮制冷劑的減少,從而導致汽車空調制冷的失敗。

　　4. The transmission belt of the automobile air conditioning compressor is loose, which will slide when the compressor works, resulting in the reduction of transmission efficiency, the reduction of compressor speed, and the reduction of transmission of compressed refrigerant, thus leading to the failure of automobile air conditioning refrigeration.

　　以上是濟南奧迪汽車維修小編為大家介紹的相關內容，想要了解更多內容，歡迎訪問網站：http://m.nanofluidizer.com

　　The above is the relevant content introduced by Jinan Audi automobile maintenance editor. To learn more, please visit the website: http://m.nanofluidizer.com