Hello guys, I have the 2001 Is300 and for some reason the heater is blowing half cold and half hot air and mostly I believe that it might be the heater clogged up because it also rarely blows air, FYI coolant level is fine.
but that is not my main concern, when I'm driving I hear a repetitive clicking sound or it sounds like something is being hit against in a cycle. After I turn off my car I could hear it and after finding where it came from I could not really tell because it came from under neath the car along the exhaust pipe or at least around it. Couldn't touch it because of course it's too hot!!
Any ideas ?

 

I have the same problem with my 2001 IS300 with 140k miles. The driver side a/c vents blow cold however the passenger side vents blow warm air just like Guyis300. Any help would be greatly appreciated???