My vehicle has a dual climate control system and the conditioned air that is emitted from the driver's vents is substantially warmer than that out of the passenger vents. This condition exists when both controls are set for the same temperature in dual mode as well as when set by the driver's control in non-dual mode. For instance left side air output is 72 degrees when the right side air output is 47 degrees.
The left side blend control motor and the exterior air temp sensor were both replaced with no apparent effect. The a/c technician working on my car said he got a 105 code when he ran the BCM diagnostics using the climate control system switches. He said the 105 code indicates a bad left side blend motor control motor and this code was present even after replacing the motor with a new one. He also said he was able to manually move the blend door from the full heat to the full cool when he had the motor out and could detect no binding during the full travel of the door. Unfortunately, he was not able to isolate the problem.
I suspect there is a wiring problem causing this situation but without a wiring diagram I don't know where to start. Any suggestions you have on isolating this problem will be greatly appreciated.
Ray