Five potential reasons for the deteriorating performance of car air conditioning

In daily vehicle usage, it is often noticed that sometimes although the air conditioner is turned on, the cooling effect is not obvious. The temperature inside the vehicle remains high, which is simply a torment in summer. So, what exactly causes this situation? Let's take a look together at the reasons why the air conditioning cooling effect is not significant.

Insufficient amount of Freon in the air conditioner
Freon, as a medium that can absorb heat, can effectively remove heat and lower the temperature inside the vehicle only when there is a sufficient amount of Freon in the automotive air conditioning system. If the system does not have enough Freon due to prolonged use, failure to add it regularly, pipeline leakage, or air mixture, it cannot absorb sufficient heat and thus cannot effectively lower the temperature inside the vehicle, resulting in insufficient cooling.
Here are two simple methods to determine if there is a lack of Freon for you.
Firstly, feel the exhaust air from the outdoor unit by hand. If there is no heat sensation, it indicates that the refrigerant in the air conditioner is insufficient, causing a decrease in condensation pressure and temperature. At this time, Freon needs to be added.
Another method is to observe the drainage pipe of the indoor unit. If the water output of the indoor unit drainage pipe is small or there is no water at all. This indicates a lack of Freon in the air conditioner, resulting in a decrease in cooling capacity and the condenser's inability to condense water. Both of these two methods can be used to simply and conveniently determine whether Freon should be added.

Blockage of Freon pipelines in the air conditioner
In the automotive air conditioning system, there are numerous pipelines connecting the condenser and the evaporator, and a large amount of refrigerant flows through these pipelines. If a certain part of these pipelines is blocked by small debris, the flow of the refrigerant will be blocked, unable to transfer heat effectively, and the heat inside the vehicle cannot be transferred out.

Abnormal operation of the compressor
The compressor plays a crucial role in the heat exchange process of the air conditioner. Under the operation of the compressor, the liquid refrigerant is converted into gas. During this conversion process, a large amount of heat is removed and released outside the vehicle. Through this cycle, the temperature inside the vehicle can be lowered. Sometimes, due to various reasons such as abnormal refrigerant pressure, circuit failure, damage to the temperature sensor, or burnout of the compressor electromagnetic clutch, the compressor cannot operate normally. Then, it cannot drive the movement of Freon and cannot remove the heat from the vehicle.

Poor heat dissipation effect of the condenser
The refrigerant with heat becomes a high-temperature and high-pressure gas after being compressed by the compressor. It needs to rely on the cooling of the condenser and the pressure reduction of the expansion valve to become a low-pressure and low-temperature liquid refrigerant, and finally reaches the evaporator to absorb the heat in the compartment and evaporate.
If the heat dissipation effect of the condenser in front of the water tank is poor, with phenomena such as the auxiliary fan not operating or the dust and dirt blocking the condenser fins, the liquefaction effect of the refrigerant will deteriorate, reducing the cooling capacity of the air conditioner.

Blockage of the cold air filter
Another relatively direct reason for the poor cooling effect of the air conditioner is that the air filter is blocked, resulting in too small an air volume blown out from the air outlet, which makes the driver feel insufficient cooling.