What Causes the Sudden Weak Airflow in a BMW 320's Air Conditioning?

[OJocelyn]

Here are the reasons and solutions for the sudden weak airflow in a BMW 320's air conditioning: 1. Blower Fan Failure: The blower fan is the core component that determines whether the car's air conditioning can produce airflow. If it is damaged, the car's air conditioning will inevitably fail to blow air. The blower fan failure may be caused by overheating and damage to the internal coils or capacitor damage. You can determine if there is a fault by listening to the sound of the blower fan when setting the car's air conditioning speed and airflow to maximum. Solution: Needs to be repaired at a 4S shop or repair shop. 2. Clogged Air Filter: A clogged air filter is one of the reasons for the aforementioned airflow blockage and is also the most common one. The outside air is filtered by the air filter before entering the car, which can accumulate many airborne particles and thus easily become clogged. Solution: You can remove the air filter to check if it is clean. If it's too dirty, you can replace it yourself. 3. Control System Failure: If the above two reasons are not the cause, then the problem lies in the car's air conditioning control system. The air vent, control switch, or the car's air conditioning computer could be the source of the fault. Solution: It is recommended to go to a 4S shop for repair.