What is the reason for the intermittent operation of the car blower?
2 Answers
The main reason is that the blower has been used for a long time, leading to excessive dust accumulation, which increases the friction coefficient between the rotor and the bearing. The rotor may become obstructed or even stuck, causing the coil to overheat and become damaged. Here is some related information about the car blower: 1. Composition: The blower mainly consists of an electric 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, which changes the volume between the blades in the rotor slots to suck in, compress, and expel air. During operation, the pressure difference of the blower 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.
As a veteran driver with over 30 years of experience, I've encountered similar blower issues where it would run intermittently. This is mostly caused by aging and jamming of the blower motor, especially in hot weather when bearing wear prevents smooth rotation. The resistor is another common culprit - it controls fan speed, and a faulty thermal element can make the fan work intermittently. Don't overlook wiring connection problems either; loose or corroded plugs cause unstable current, and a blown fuse will make the fan stop completely. I remember once on the highway when it suddenly failed, forcing me to drive with windows down until I could reach a repair shop. I suggest first checking the relevant fuse in the fuse box (easy to replace); if that doesn't work, clean the air duct dust or visit a professional shop to repair the motor and resistor to maintain driving comfort and safety.
