I have a 2004 Caddilac deville dts. And resently my a.c. started blowing hot air out of the passenger side while blowing cool air out of the drivers side what can i do to fix thhis?
You have a mode door fault. These things have a calibration procedure. You should be able to find the procedure on the web. If that doesn’t work, you probably have a bad mode door actuator.
There’s a problem with the blend door on the passenger side.
It could be a bad blend door actuator, or a problem with the blend door itself.