The main symptoms of a clogged air conditioner evaporator include a significant drop in cooling efficiency, reduced air volume from the air outlet, abnormal icing on the evaporator, abnormal operating pressure in the system, and the generation of peculiar odors.
Significant Decline in Cooling Performance
When the surface of the evaporator is covered with dust or dirt, the heat exchange efficiency decreases, and the transfer of cold air is blocked. Even if you lower the temperature or increase the wind speed, it is difficult to achieve the expected cooling effect.
In severe cases of blockage, the refrigerant circulation volume decreases or even stops, and the air conditioner may completely stop cooling.
When the surface of the evaporator is covered with dust or dirt, the heat exchange efficiency decreases, and the transfer of cold air is blocked. Even if you lower the temperature or increase the wind speed, it is difficult to achieve the expected cooling effect.
In severe cases of blockage, the refrigerant circulation volume decreases or even stops, and the air conditioner may completely stop cooling.
Airflow Blockage and Abnormal Icing
A clogged evaporator will lead to a noticeable reduction in the air volume from the air outlet, reducing the efficiency of air circulation in the car/room.
If the refrigerant circulation is not smooth, the local temperature of the evaporator may be too low, causing icing. Especially in household air conditioners, this manifests as frost or ice formation on the surface of the indoor unit's evaporator.
A clogged evaporator will lead to a noticeable reduction in the air volume from the air outlet, reducing the efficiency of air circulation in the car/room.
If the refrigerant circulation is not smooth, the local temperature of the evaporator may be too low, causing icing. Especially in household air conditioners, this manifests as frost or ice formation on the surface of the indoor unit's evaporator.
Abnormal System Operation and Pressure Changes
Rising pressure on the high-pressure side and falling pressure on the low-pressure side: Blocked refrigerant circulation causes pressure imbalance in the system, increasing the load on the compressor, which may trigger overload protection and shut down.
The compressor may produce increased operating noise, accompanied by abnormal fluctuations in current (current decreases under low load, but overall energy consumption may increase due to continuous operation).
Rising pressure on the high-pressure side and falling pressure on the low-pressure side: Blocked refrigerant circulation causes pressure imbalance in the system, increasing the load on the compressor, which may trigger overload protection and shut down.
The compressor may produce increased operating noise, accompanied by abnormal fluctuations in current (current decreases under low load, but overall energy consumption may increase due to continuous operation).
