I'm having the same problem is this very common on contour's?? I've only had my car for a year and never had problems with it, until now
it's at the shop as I'm typing this, I had to by a new compressor (used but original and very good) it was having a really bothering sound
and the fan dosen't work as it should, I changed the coolant sensor thinking that could be it but it seems it didn't fix the whole problem.. any ideas???
