What is the reason for the hot air from the car air conditioner?

You can check these two aspects: \x0d\ 1, cleaning water tank and condenser \ x0d \ x0d \ Water tank and condenser are important parts of vehicle cooling system and air conditioner. Because the vehicle has been used for a long time, dust, sediment and catkins will be mixed in the gaps between them, which will affect the water temperature and the refrigeration performance of the air conditioner. \x0d\\x0d\2。 Check the air conditioning pressure and replace the refrigerant \ x0d \ x0d \ First, check whether (h) is a high-pressure detection tube (L) is a low-pressure detection tube, and connect fluorine pressure gauges respectively. After connecting the fluorine pressure gauge, the vehicle will start idling. Turn on the air conditioning switch at this time, and the air conditioning system will start the maximum operation test. The pressure detection high pressure in idle state should not exceed 300, and the low pressure in idle state should not exceed 60. \ x0d \ x0d \ After idling for a few minutes, observe the pressure change of the pressure gauge by increasing the oil supply speed to check whether the air conditioner compressor works normally. Then take out the original refrigerant (134a), the weight of which is generally between 250g and 300g, and connect the pressure gauge to prepare for fluoridation. It is recommended to add about one bottle for cars of two or three years, and two bottles for some models.