ColoLX

I have had my 2008 LX570 for about a year (3rd one - had a 2000 & a 2003) and recently the only vent that will blow cold is the one to the right of the steering wheel. The rest just blow air and the AC seat on the drivers side is blowing, but not cold. Curious if anyone has heard of or seen this before and would appreciate ANY insight. On a few occasions, it has emitted "condensation/mist/steam" out of the one cold vent but the dealer is being wishy washy and hoping someone has some insight.......actuator in the dash, cylinoid, etc.?

Thanks

Colo-LX