I experienced the dreaded fresh air vent actuator failure a few years ago and now I have a slightly different buzzing problem. While the actuator was a loud ticking/clacking noise, this one is fairly quiet. Its not a constant buzz, but it will start low, get a bit louder over maybe 5-10 seconds, then suddenly quit. It happens when the car is idling at a stop, or at any speed while in motion. fan on or off, fresh air on or off. a/c on or off. defrost on or off. Sounds like its coming from somewhere between the stereo and the airbag/glove box, closer to the firewall.
I've gone through numerous posts but nothing seems similar to the problem i'm having. I plan on pulling the radio and the glove box out next week when I get a day off, and in the mean time, I just turn up the radio so the noise doesn't drive me batty.
Any thoughts as to what it can be?????
Thanks!
Dee
2004 AWD Moons n Tunes with 135,000 miles