What is the reason for the noise after installing the air conditioning filter?
2 Answers
The reason for the noise after installing the air conditioning filter is that the air conditioning filter was not installed properly. You need to remove the air conditioning filter to see if the noise persists. If there is no noise, it indicates that the quality of the air conditioning filter is poor, and a new air conditioning filter should be replaced. The functions of the air conditioning filter are: 1. Provide fresh air for the car interior; 2. Ensure safety and hygiene in the car; 3. Adsorb harmful substances; 4. Filter solid impurities in the air. The method for replacing the air conditioning filter is: 1. Remove the damping rods on both sides of the glove box; 2. Remove the glove box to see the black rectangular baffle, pry it open and remove the clips; 3. Take out the old air conditioning filter; 4. Install the new air conditioning filter.
I've been driving for over a decade and have encountered several instances where the AC filter made a whooshing sound after installation. At first, I thought the fan was broken, but experience taught me that the most common cause is improper filter installation. For example, if the edges aren't secured tightly or the position is slightly off, air squeezing through gaps can create a whistling sound. With cheap aftermarket filters purchased online, size mismatches or thin materials can cause more pronounced resonance noise when air flows through. The solution is to reinstall the filter, ensuring all edges are flat and tightly secured—sometimes OEM filters are necessary. Additionally, a dirty filter can force the AC fan to spin faster, generating noise, so regular cleaning helps prevent this. I remember one time I rushed through filter replacement without checking, and the noise persisted until a friend helped fix it. Now I always carefully review installation guides before changing filters.
