How to Solve the Buzzing Noise from Car Air Conditioner Blower?
2 Answers
Adding lubricating oil to the blower bearing can resolve the issue. If the buzzing noise is caused by foreign objects, simply removing the foreign objects will suffice. If the above methods do not solve the problem, replacing the blower with a new one is an option.
I've been driving for many years and it's quite common to encounter a buzzing sound from the AC. The main issue could be with the blower motor, such as worn-out bearings or something stuck in the fan blades. My car had the same problem last time—it started with a slight buzz that I ignored, but the noise gradually got louder, especially when running the AC on the highway. First, I popped the hood to locate the source of the sound. If it’s confirmed to be from the blower, check the cabin air filter—often, it’s clogged with dust, causing poor airflow. Try cleaning it or replacing it with a new one. If the noise persists after cleaning, the motor itself might be faulty and need replacement. The blower is usually located under the dashboard, which can be tricky to access for DIY repairs, so it’s best to take it to a professional shop. Ignoring the buzzing sound isn’t just annoying—it could also damage other components. Making it a habit to regularly maintain your AC system can help prevent this issue.