What are the reasons for the blower not working?

[LucyFitz]

The reasons for the blower not working are: 1. Fuse failure; 2. Blower relay failure; 3. Internal failure of the blower motor; 4. Power transistor or blower switch failure; 5. Circuit failure; 6. Air conditioning control unit failure. More details are as follows: 1. The working principle of the blower is similar to that of a centrifugal fan, except that the air compression process is usually carried out under the action of centrifugal force through several working impellers (or stages). 2. The blower has a high-speed rotating rotor, and the blades on the rotor drive the air to move at high speed. The centrifugal force causes the air to flow along the involute shape of the casing to the blower outlet, and the high-speed airflow has a certain wind pressure. New air enters from the center of the casing to replenish.

[KendraMarie]

I remember when I was driving, I noticed the air conditioner wasn't blowing any air, and the blower had completely stopped working. There could be several reasons for this. First, check the fuse—usually, the fuse box is located under the dashboard or in the engine compartment. Open it up and look for any signs of blackening; if it's blown, you'll need to replace it. Another common issue is a faulty motor, such as fan blades being blocked by leaves or dust, or the motor wearing out due to aging, causing it to stop turning. The last time I encountered this problem, it was because the wiring connection had come loose—long-term vibrations had caused the plug to loosen and make poor contact. The relay could also be faulty; this little component controls the current and, if broken, cuts off the supply. If the resistor fails, the fan speed adjustment will stop working. Driving in summer especially relies on the air conditioner, and once the blower stops, not only does it get unbearably hot, but the windows can also fog up, affecting visibility. So, I recommend first checking the fuse and basic connections yourself. If that doesn't work, get it repaired promptly to avoid turning a small issue into a bigger one, wasting more money and time.

[VanWalker]

With my over ten years of driving experience, most cases of a blower not working are related to the electrical circuit or the motor itself. The most common issue is a blown fuse, usually located in the fuse box under the driver's seat—just replace it with a new one. Next is the motor itself, which might not turn due to excessive bearing wear or damaged brushes. If the fan spins but the airflow is weak or unstable, the resistor is likely the culprit. Switch or relay failures are also common, especially in certain models where the control unit is prone to overheating damage. Wiring issues, such as corroded or broken connectors, can also interrupt signals. Additionally, don’t overlook blockages in the blower system—when cleaning the cabin air filter, check for debris stuck in the fan blades. My car once had no airflow due to a faulty relay, and replacing the part for around a hundred bucks fixed it. Regular checks on these points can save a lot of trouble, as safe driving relies on a reliable air conditioning system.

[Nate]

When I find the blower malfunctioning, I usually start with simple self-checks. The first step is to check if the fuse is blown—look for the fuse box in the engine compartment or on the side of the dashboard. Second, test the motor operation by unplugging the connector and measuring the voltage with a multimeter; it should normally read 12V. If there's no voltage, the wiring or switch might be faulty. Third, inspect the resistor, as this component is prone to failure when the fan speed becomes unadjustable. During daily driving, possible causes include short circuits in the wiring, water ingress corroding the motor, or aging switch contacts. Simple fixes like replacing a fuse can be done yourself, but motor issues require professional handling. Safety first—avoid tampering with the electrical system to prevent electric shock.