What causes the lack of air from Wuling's air vents?
2 Answers
The reasons for the lack of air from Wuling's air vents: 1. Damage to the Junction Box Electronics (JBE): The air conditioning control unit transmits the Pulse Width Modulation signal (PWM signal) through the Junction Box Electronics (JBE), effectively delivering it to the fan's output stage, which controls the operation of the fan motor and adjusts the fan speed based on the PWM signal. 2. Damage to the LIN bus: One of the LIN buses controls eight series-connected damper motors in the air conditioning system. Each damper motor contains a measurement resistor of approximately 1Ω, through which the subsequent damper motor is connected to the preceding one.
I've had similar troubles before. That time when I was driving my Wuling out of town for work, the air vents suddenly stopped blowing air, and I was sweating like crazy. It could be that the blower motor is stuck or broken—this part is hidden behind the dashboard and tends to fail as it ages. A quick way to check is to start the car, turn on the AC, and listen near the glove compartment for any sound. If there's no noise, it might be a blown fuse. Locate the AC fuse in the fuse box under the driver's seat, replace it with a new one, and see if that works. If it still doesn't work, perhaps the switch button has poor contact—try pressing the fan speed button a few more times. Don’t overlook the possibility of blocked air ducts either; debris stuck inside can prevent airflow. In short, don’t delay fixing it—driving without AC in summer can make you drowsy and dangerous. I recommend taking it to a repair shop for a quick fix—it’s hassle-free and safer.
