Originally Posted by kingkub57
There are stepping motors that controll the heat blend doors for passenger and the drivers sides, the passenger one may be binding up and not fully moving the door, or the flap is sticking at times, or could be the controller itself, the fan controller I think just controlls fan speed.
Bingo, unlike older cars, the passanger side ducting and drivers side ducting are seperated from each other, to include the ducts running up from the air cooler from the a/c and the heater core. Your passanger side is either binding, the flow control motor is kapoot or your temp control roller switch is sour.