It is summer, and the use of air conditioners is indispensable. At present, car owners are not very aware of the maintenance of car air conditioners. If they just use maintenance methods without considering the air conditioner, it will easily lead to problems with the air conditioner in the long run. So, what problems are prone to occur in the air conditioning system?
1. Clean the water tank and condenser
The water tank and condenser are important components of the vehicle cooling system and air conditioner. As the vehicle is used for a long time, dust, sediment, catkins, etc. will be mixed in the gaps between the two, which will affect the water temperature and air conditioning refrigeration performance. performance.
2. Check the air conditioning pressure and replace the refrigerant
First check that (H) is the high-pressure detection pipe and (L) is the low-pressure detection pipe, and connect the fluorine pressure detection gauge respectively. After the connection of the fluorine pressure gauge is completed, the vehicle starts to start idling. At this time, turn on the air conditioning switch, turn the air conditioning system to the maximum and start running the test. The high pressure in the idle state pressure test should not exceed 300, and the low pressure in the idle state should not exceed 60.
After idling for a few minutes, increase the speed by adding oil to observe the pressure change on the pressure gauge, and check whether the air conditioner compressor is operating normally. Then take out the original refrigerant (134a). The weight is generally between 250g-300g. Connect it to the pressure gauge and prepare to add fluoride. It is recommended that cars that are two or three years old generally use about one bottle. Some models can add two bottles.
3. How to choose the viscosity of engine oil in summer?
It is summer, and the use of air conditioners is indispensable. At present, car owners are not very aware of the maintenance of car air conditioners. If they just use maintenance methods without considering the air conditioner, it will easily lead to problems with the air conditioner in the long run. So, what problems are prone to occur in the air conditioning system?
1. Clean the water tank and condenser
The water tank and condenser are important components of the vehicle cooling system and air conditioner. As the vehicle is used for a long time, dust, sediment, catkins, etc. will be mixed in the gaps between the two, which will affect the water temperature and air conditioning refrigeration performance. performance.
2. Check the air conditioning pressure and replace the refrigerant
First check that (H) is the high-pressure detection pipe and (L) is the low-pressure detection pipe, and connect the fluorine pressure detection gauge respectively. After the connection of the fluorine pressure gauge is completed, the vehicle starts to start idling. At this time, turn on the air conditioning switch, turn the air conditioning system to the maximum and start running the test. The high pressure in the idle state pressure test should not exceed 300, and the low pressure in the idle state should not exceed 60.
After idling for a few minutes, increase the speed by adding oil to observe the pressure change on the pressure gauge, and check whether the air conditioner compressor is operating normally. Then take out the original refrigerant (134a). The weight is generally between 250g-300g. Connect it to the pressure gauge and prepare to add fluoride. It is recommended that cars that are two or three years old generally use about one bottle. Some models can add two bottles.
3. How to choose the viscosity of engine oil in summer?
In summer, many car owners complain about oil consumption. In fact, in summer, you can choose lubricants with lower viscosity. Of course, this is also under the premise that the car is in good condition and the wear is relatively small. For older cars with more kilometers and older vehicles, lubricants with slightly higher viscosity should still be used.
4. How to clean the air conditioning duct and replace the filter element?
The life of the car's original air-conditioning filter element is to be replaced every 12,000 kilometers. This is generally under normal circumstances. The method to clean the ventilation duct is very simple, that is, use a wet towel to block the air outlet of the air conditioner, and adjust the air conditioner wind speed to the maximum, so that the dust will be sucked on the towel. In addition, you can also use air conditioning duct cleaning agent to assist the high-pressure air gun cleaning 2 to 3 times to achieve the purpose of cleaning.
5. How to clean up the musty smell of air conditioners?
Some car owners will find that when the air conditioner is turned on, a musty smell will blow out from the air outlet. This is because the air supply duct is not cleaned in time. The simplest way is to clean the air duct of the air conditioner. As we mentioned above, users can purchase air conditioner cleaning agent to assist the operation. When the air conditioner is finished using, it should not be turned off immediately. Instead, the air supply switch should be turned on for 5 minutes to provide air. Recommended reading: What should I do if my car air conditioner has a strange smell?
In addition, vehicles must pay attention to the use of the vehicle's internal and external circulation systems when summer comes. Many models now have automatic air conditioners, while some models have manual air conditioners. We should pay attention at this time. When external circulation is used, the air conditioner takes in air from outside the car, while internal circulation circulates air inside the car.
