Why is there no air coming out of the BMW 5 Series air conditioner?
2 Answers
BMW 5 Series air conditioner not blowing air is mainly due to faults in the blower motor, air filter, or control system. Here are the relevant details: 1. Solutions: You can determine if there is a fault by turning the car air conditioner's fan speed and air volume to the maximum and listening for the sound of the blower motor. If the air filter is faulty, it can be resolved by replacing the filter. If neither of these faults is the cause, then the issue lies with the air conditioner control system, which requires inspection and repair at an auto repair shop. 2. Clogged air filter: A clogged air filter is the most common reason for the air conditioner not blowing air. Outside air passes through the air filter to enter the car, and it also traps many airborne particles, making it prone to clogging. You can remove the air filter; if it is not very dirty, use an air gun to clear the debris and then reinstall it to check if the air vent issue is resolved.
I've seen quite a few BMW 5 Series with this kind of AC issue. Usually, it's the blower motor that's failed, so the air just won't blow. The blower in BMWs is located under the dashboard, and issues like motor aging and burning out or seized bearings can cause this. Another possibility is a completely clogged cabin air filter, which blocks airflow, making it seem silent. The electronic control unit could also be faulty—BMWs use smart systems, so software updates or module damage might be the culprit. Other common causes include aging wiring harnesses causing short circuits or blown fuses. My advice: when you turn on the AC, listen for the blower sound. If it's silent, first check the filter under the glove box. Regular maintenance and filter replacements can prevent this, and it's good to check the AC before summer—a dealership diagnostic tool works well. Safety tip: no airflow affects defogging, so don't ignore it.
