Hi guys, again..

Ever since I bought the car with 120K miles, the air conditioner has been making noises like this. There is nothing wrong with the cold blowing. But when it blows hot, sometimes it blows full cold in the driver's seat, sometimes it blows hot and cold. To fix it, I turn it off completely and bring it to the last speed. it usually gets better, but there are times when it doesn't. What do you think what can I do?

 

Sounds like the fan motor going bad to me.

 

I would guess an air control valve sticking. My fan has been "going bad" for over ten years, it makes a different noise but the HVAC works fine.