What Causes Uneven Airflow in Car Air Conditioning?
3 Answers
The main reason for this situation is the failure of the air guide plate, and it needs to be addressed at a repair facility. Below is an introduction to car air conditioning: 1. Introduction: Car air conditioning refers to the air conditioning device installed in a car, which can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. 2. Structure: It generally includes a refrigeration device, heating device, and ventilation device. This combined system makes full use of the limited space inside the car, with a simple structure and easy operation, making it a popular modern car air conditioning system internationally. 3. Arrangement: Different types of air conditioning systems have different arrangement methods. Currently, integrated heating and cooling air conditioning systems are widely used in cars. The arrangement involves assembling the evaporator, heater radiator, centrifugal blower, and control mechanism together, known as the air conditioning unit assembly.
After driving for so many years, it's always frustrating when the AC blows cold air on one side while the other side feels completely stagnant. The issue often stems from blocked air ducts—like toy fragments dropped by kids or accumulated dust clogging the ducts and disrupting airflow. Another common culprit is a faulty blend door, which acts like a small valve controlling airflow direction. If it gets stuck or the motor fails, airflow gets stuck on one side. Electrical issues, such as loose or corroded wiring connections, also frequently cause trouble, especially in older cars. When I check it myself, I first replace the cabin air filter to see if it's dirty. If the filter is clean, I remove the vent panel to manually clean the interior or gently adjust the blend door. Never delay repairs—blurry vision from uneven cooling on summer highways is dangerously distracting. It’s always safer to get it fixed promptly at a shop rather than worrying on the road.
As a DIY car repair enthusiast, I find the issue of uneven air conditioning airflow quite straightforward. My first instinct is to check the cabin air filter - if it's dirty, just replace it with a new one, saving both time and money. Next, I cycle through different fan speeds and vent modes. If either the left or right side has absolutely no airflow, there's an 80% chance it's a faulty or stuck blend door actuator. This small motor controls the vent flaps, and if it burns out, the flaps won't move. I've taken apart dashboards before - sometimes simply reseating the electrical connector with a screwdriver or manually adjusting a stuck vent flap solves the problem. For obstructed air ducts, a thorough cleaning restores proper airflow. With just basic tools, the job takes about half an hour, avoiding unnecessary expenses. However, work gently to avoid damaging internal components. If unsure, it's wiser to seek professional help.