All,

Will try to do more homework on this, but thought I'd throw it out there and see if anyone has any thoughts.

Just returned from extended travel and started up the RS6. Of course, since it’s now warm here, I tested the A/C. Was set for 70 in both driver’s and front passenger's zones. Blew seemingly cold air to passenger's zone, but clearly warm(er) air to driver’s. Eventually, the air for the driver’s zone did cool down (some), but was still not blowing at the same temp for the passenger’s. So, it’s warmer on the driver’s side. After driving it for a bit and parking, when I restarted, one was cold and the other was hot. Again cooled down, but not to the same temp.

It’s been a while since I've had an a/c service on it. I assume it’s just one a/c system, so I don’t know why one side would blow colder than the other. Maybe the driver’s zone temperature sensor has gone bad?

Thanks,

CW