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Why does the BMW 3 Series air conditioning suddenly have weak airflow?

1 Answers

RuthMarie

07/29/25 10:24pm

If the airflow from the car vents varies in strength, you can check whether there is an issue with the air conditioning filter, whether the air conditioning ducts are blocked, or if the condenser is clogged. The specific details are as follows: Blower malfunction: The blower is the core component that determines whether the car air conditioning can produce airflow. If it is damaged, the car air conditioning will inevitably fail to blow air. Blower malfunctions are usually caused by overheating damage to internal coils or capacitor failure. You can listen to the sound of the blower by setting the car air conditioning speed and airflow to maximum to determine if there is a malfunction. In this case, it is necessary to go to a 4S shop or repair shop for repairs. Air conditioning filter blockage: A clogged air conditioning filter is one of the reasons for the aforementioned air duct blockage and is the most common cause. Outside air passes through the air conditioning filter before entering the car, trapping many airborne particles, which can easily lead to blockages. In this case, you can remove the air conditioning filter to check if it is clean. If it is very dirty, replace it with a new one. Control system malfunction: If the issue is not caused by the above two reasons, then the problem lies in the car air conditioning control system. Faulty dampers, control switches, or the car air conditioning computer could be the cause. In this case, it is recommended to go to a 4S shop for repairs.

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