1. Lack of refrigerant
Car air conditioners generally add refrigerant once every 2 to 3 years. Some cars even add refrigerant once a year. The owner of the car has a very big head. Has all the refrigerant gone out? Why should it be added frequently? Doesn’t the air conditioner have a sealing device? In fact, even if the air conditioner is sealed very tightly, it still cannot prevent the refrigerant from flying away. In addition, there may be slight leaks in the air conditioning pipeline or condenser. The loss of refrigerant is mostly due to leakage. If your car’s air conditioner is defective and it starts to fail again after a period of time after adding refrigerant, then you should pay attention. If the condenser leaks, you need to replace the condenser. The method of checking the leakage is also more troublesome. Generally, if you add a fluorescent agent to the fluorine oil and use special glasses to look at it, you can find out where the dew point is! There is also a relatively simple method suitable for serious leaks. Sometimes, you can see through the middle screen that there is oil and moisture on the surface of the condenser. When this happens, it is usually caused by leakage in the condenser.
2. The air conditioner flap is damaged
The air conditioner flap motor is damaged. This fault is relatively rare, and it is not that it has never happened. If there is a problem with the flap motor, it will be troublesome. The flap motor is usually located in the middle and lower part of the instrument panel and is the main switch for the air outlet of the air conditioner. If it is broken, it means that the switch is broken. Even if the air conditioner can cool the cold air, it can only get through the cracks. Coming out is like drinking poison to quench thirst. When you find that no air comes out after turning on the air conditioner, you should be careful. Replacing the flap motor requires dismantling the instrument panel, which is a huge project.
3. The condenser is too dirty
In summer, it is often found that the air conditioner is defective. If there is no problem with the air conditioning system, the high and low pressures are basically normal. Go to the 4S shop to repair the car. It is often recommended that car owners do an activity of cleaning the water tank. The purpose of cleaning the water tank and condenser is mainly to dissipate heat. If spring catkins and willow catkins are stuck on the condenser, it will cause the engine temperature to be too high or the air conditioner to be poor. Therefore, every time after spring, car owners must check whether the water tank is clean or not. A lot of hair was blurred. When cleaning, be sure to blow it clean with a spray gun first. If you use a water gun to clean it, it will be counterproductive. Not only will the air conditioner be bad, but the fuel consumption will also increase.
4. The air-conditioning compressor, throttle valve or expansion valve is damaged
There is a saying in the air-conditioning compressor circle that “low pressure is high, high pressure is low” The compressor needs to be replaced.” I don’t know that the senior person summed it up so brilliantly. The probability of the air conditioner compressor being damaged is low, so you don’t need to be tooconcerned about it. As for expansion valve and throttle valve failure, it directly leads to poor air conditioning. These inspections are cumbersome and need to be repaired by a more professional repair shop.
5. The belt is old and too loose
I checked all the equipment of the air conditioner and found that there is no problem. So what? What went wrong? In fact, the belt is also a relatively neglected component.Generally, the 4S store will remind you to replace the belt during maintenance. If it is not replaced, it will slip during use, which will cause belt breakage, abnormal noise, no power, and poor air conditioning. Therefore, it is also necessary to check the engine belt.
There are many reasons for poor air conditioning, such as the failure of the indoor temperature sensor, outdoor temperature sensor, etc. There are many very small reasons that cannot be checked. Don’t worry if the air conditioning is defective. If you exclude the above 5 points, it will basically not happen. Something is wrong.
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