Why is there no air coming out of the car's air conditioner?
1 Answers
Common reasons for no air coming out of a car's air conditioner include blower motor failure, air filter clogging, and control system malfunctions. The car's air conditioning system primarily relies on the blower motor to draw air into the vehicle, which then circulates through the air ducts. The ducts are equipped with damper structures that regulate airflow by controlling the blower motor's speed and the dampers' opening and closing. Below are more detailed explanations: 1. Clogged Air Filter: The most frequent cause of no airflow is a clogged air filter. Typically, outside air passes through the air filter before entering the car's interior. The air filter's primary function is to block dust, particles, moisture, and other contaminants. It also provides strong antibacterial and deodorizing effects, ensuring that passengers do not inhale harmful gases, which could threaten their health and driving safety. Generally, the air filter is installed above or below the blower motor. 2. Blower Motor Damage: The blower motor is a critical component of the air conditioning system, responsible for circulating air inside the vehicle. When using the air conditioner at higher fan speeds, a humming sound is often heard beneath the front passenger seat. This is the sound of the blower motor working—the greater the airflow demand, the faster the motor must draw in air. If the blower motor is damaged, it may fail to draw sufficient air or stop drawing air altogether, resulting in no airflow from the air conditioner. 3. Damper, Computer, or Switch Malfunction: If the above two causes are ruled out and the air conditioner still does not produce airflow, consider whether the issue lies with the damper, air conditioning computer, or control switch. These three scenarios are less common and can be difficult to diagnose once they occur.
