No Heat Passenger Side. I have a 1999 Cadillac Deville. The problem is I can't get heat on the passenger side. Air blows but it is cold. I do have heat on the driver?s side. My car has the spate control for the passenger on the door. I have turned both controls set of controls on and off (Driver and Passenger). Also the air coming out of the passenger side comes out at a higher velocity.

Hello: You have a failed temperature control actuator for the passenger air mix door. Remove the glove box and the close out panel under the dash on the passenger side. You will see two silver rods going from the actuators (mounted on the top and bottom of the heater/a/c programmer) Turn key on (engine off) Turn the a/c heater control on. Go from 60 to 90 or 90 to 60 and watch the rods the one that doesn't move is the failed one. The actuator is held in place by two 7mm screws and one electrical connector. When installing the new actuator have the temp set at 60 when you hook up the linkage. The passenger side set at full cold.