What Causes the Car Air Conditioner's Wind Power to Fluctuate?
2 Answers
Possible reasons for the fluctuating wind power of a car air conditioner are as follows: The air volume of the car air conditioner is controlled by the blower resistor. If the air volume of the car air conditioner fluctuates, it may be due to a problem with the blower resistor. If there is an issue with the air door control system, it can also cause this phenomenon. It is recommended to go to a 4S shop for inspection and repair. Relevant information about car air conditioners is as follows: 1. Introduction: A car air conditioner refers to the air conditioning device installed in a car, which can cool, heat, ventilate, and purify the air inside the compartment, providing a comfortable riding environment for passengers, reducing the driver's fatigue, and improving driving safety. 2. Structure: It generally includes refrigeration devices, heating devices, and ventilation devices. This combined device makes full use of the limited space inside the car, with a simple structure and easy operation, making it a popular modern car air conditioning system internationally.
I've been driving for decades and have seen plenty of cases where the AC airflow fluctuates unpredictably. The most common cause is a clogged cabin air filter with accumulated dust, which obstructs airflow and makes the fan speed erratic. Alternatively, the blower motor might be aging, causing unstable operation and producing a humming noise. If the resistor module has poor contact, the electronic signals controlling fan speed become intermittent, leading to inconsistent airflow. This issue tends to occur more frequently during hot summers due to increased dust and poor heat dissipation. I recommend replacing the filter every six months and regularly cleaning the air vents, otherwise it affects cabin air quality and can cause headaches during long drives. When troubleshooting, start with checking the filter—it's the simplest approach that saves both time and money with proper preventive maintenance.
