What Causes Reduced Airflow in Car Air Conditioning?
2 Answers
Reasons for reduced airflow in car air conditioning: 1. Excessive accumulation of impurities and dust on the condenser, leading to poor cooling performance; 2. Too many impurities in the air filter, affecting the blower's air intake and reducing airflow; 3. Excessive impurities on the evaporator, significantly impacting both the air intake and cooling performance of the air conditioning system, severely compromising its cooling effect; 4. Frost formation on the evaporator surface, which severely obstructs air conditioning ventilation. Car air conditioning refers to the air conditioning system installed in vehicles, capable of cooling, heating, ventilating, and purifying the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety.
I used to have very weak airflow from my car's AC, and it felt like almost no air was coming out of the vents, which was especially unbearable in summer. Later, I learned to check it myself and found that the cabin air filter was completely clogged with dust—once I cleaned it, the airflow improved significantly. If the blower motor is the issue, it could be due to worn bearings or broken wiring, causing weak rotation; or maybe the ventilation ducts are blocked by debris and leaking air. I recommend trying to replace the filter yourself first—most cars have accessible filter compartments, and it’s a simple and hassle-free fix. If that doesn’t work, inspect the blower fan to see if the motor sounds normal when running. Regular maintenance can prevent this, like cleaning the filter every three months. Otherwise, prolonged weak airflow affects driving comfort and can lead to fatigue in hot weather. Don’t ignore it—just fix it, and you’ll be fine.
