I am trying to identify a strange buzzing noise which comes from the AC/Heating System. The buzzing noise starts when I first start the car most of the time. However, it is intermittent and goes on and off when the AC/Heating System buttons are pushed. The system seems to be working all right. But the buzzing would seem to indicate that something is either bad or going bad.
Has anyone else had this problem?
The RX300 has 180,000 miles and runs very well.
Also, I have a question concerning the timing belt replacement. The belt was replaced at 90,000. Should it be replaced again at 180,000?
Thank you for your responses.
