How to replace a blend door actuator on a 2002 cadillac deville

SOURCE: 1999 cadillac Deville cold air blowing out passenger side vents

Sounds like a Blend door issue, but could be the controller switch, Test ALL modes of operation to see what works and what does not. That should narrow it down a bit. The Blend doors are flap/ doors that regulate air flow, newer vehicles are plastic - electric assemblies ...prone to failure. Any clicking or thumping noises during switching modes and on-off suggest a bad Blend door. Hope that helps...good luck

SOURCE: Engine running hot displays on dash....cold air blowing thru vent

there,s a chance that your hot-cold air trap is not working

SOURCE: ac vents

One of the temperature actuators are not working it has 2, one for each side.

SOURCE: my 93 cadillac sedan deville's heat doesnt work

check the heater control valve. sounds to me like the dash control unit that opens and closes the vents may not be functioning properly

SOURCE: No Heat Passenger Side. I

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.