What are the causes of Volkswagen fresh air blower failure?
2 Answers
The reasons are blower fuse, blower motor, and thermostat resistor failure. Below is relevant information about automotive blowers: 1. Composition: The blower mainly consists of a motor, air filter, blower body, air chamber, base (also serving as an oil tank), and oil drip nozzle. 2. Working principle: The blower operates via an eccentrically placed rotor inside the cylinder, where the changing volume between the blades in the rotor slots sucks in, compresses, and expels air. During operation, the pressure difference automatically delivers lubrication to the oil drip nozzle, which drips into the cylinder to reduce friction and noise while preventing gas backflow. This type of blower is also known as a sliding vane blower.
A blower malfunction can be caused by several different factors. If you're referring to the fresh air blower in Volkswagen models, common issues include motor aging or burnout—after all, that component keeps running continuously in the car, and after several years of use, the motor coils are prone to wear or overheating failure. Another issue is electrical circuit problems, such as blown fuses or relay failures. These components control the current in the circuit; once they burn out, the blower loses power and naturally stops working. Additionally, poor wiring connections are common—over time, plugs or terminals can loosen or corrode, leading to unstable connections. Fan blade jamming is another problem, caused by dust or small debris entering the system, preventing normal rotation. A faulty control module could also be the culprit, as it regulates fan speed and, if broken, can no longer command the blower. In short, if you notice symptoms like the blower not spinning or weak airflow, first check the fuse box—that's the simplest troubleshooting step. If that doesn't work, take it to a professional shop to inspect the overall circuit and components.
