Air Conditioning Maintenance for Cars in Winter

add freon to car air conditioner

For driving in autumn and winter, the normal operation of the air conditioning system becomes the key to driving. At present, some car owners do not know much about the use and maintenance of car air conditioners. Here we recommend that you prepare for the inspection of your car before the fall and winter, especially a car that is more than 4 years old.

1. Clean the water tank and condenser

Water tanks and condensers are important components of vehicle cooling systems and air conditioners. With the long-term use of the vehicle, dust, sediment, catkins, etc. will be mixed in the gap between the two, which will affect the performance of water temperature and air conditioning.

2. Check the air conditioner pressure and replace the refrigerant

First, check the high-pressure detection tube and the low-pressure detection tube. Connect the fluorine pressure detection gauges respectively. After the fluorine pressure gauges are connected, the vehicle starts to run at idle speed. At this time, turn on the air-conditioning switch, and the air-conditioning system is turned on to the maximum to start the operation detection. The pressure detection high pressure in the idle state should not exceed 300, and the low pressure in the idle state should not exceed 60. When idling for a few minutes, increase the speed by adding oil to observe the pressure change of the pressure gauge, and check whether the air conditioner compressor is running normally. Then take out the refrigerant, the weight is generally between 250g-300g, connect to the pressure gauge and prepare to add refrigerant. It is recommended to use about one bottle for two or three years of car use, and some models can add two bottles.

3. Correctly choose the oil viscosity in autumn and winter

In autumn and winter, many car owners complain about fuel consumption. In fact, in autumn and winter, you can choose lubricating oil with lower viscosity. Of course, this is also under the premise of better vehicle condition and less wear. For old cars with more kilometers and longer ages, it is still necessary to use lubricating oil with a slightly larger viscosity.

4. Clean the air duct and replace the air conditioner filter element

The life of the air conditioner filter element is to be replaced once every 12,000 kilometers, which is generally under normal circumstances. The method of cleaning the air duct is very simple, that is, block the air outlet of the air conditioner with a wet towel, and adjust the air speed of the air conditioner to the maximum, so that the dust will be absorbed on the towel. In addition, you can also use the air duct cleaning agent to assist the high-pressure air gun to clean 2 to 3 times to achieve the purpose of cleaning.

5. Clean up the musty smell of the air conditioner

Some car owners will find that when the air conditioner is turned on, the air outlet will blow a musty smell. This is because the air supply duct is not cleaned in time. The easiest way to solve it is to clean the air duct, you can use an air conditioner cleaner. When the air conditioner is finished, it should not be turned off immediately, but continue to open the air supply switch for 5 minutes to supply air.

6. Correct use of the internal and external circulation systems of the air conditioner

In the autumn and winter, we must pay attention to the use of the internal and external circulation systems of the car. Many models now have automatic air conditioning, while some models have manual air conditioning. We need to note that when the external circulation is adopted, the air conditioner enters the air from the outside of the car, while the internal circulation is used to circulate the air inside the car. Internal circulation can improve the effectiveness of air conditioning, but long-term use of internal circulation will reduce the air quality in the car, which may make people feel dizzy. Under normal circumstances, it is recommended that you use external circulation to allow fresh air to enter the car and improve air quality.


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