The problem is with the DCCV Duel Climate Control Valve. It is located at the passenger side of the radiator. Look down and you will see two hoses going in at top and one hose going in at bottom. If your planning on doing repair yourself for the first time , you will find that you will have to remove many parts to get to this valve. Good Luck Friend.
SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.
the motor for the passenger side
blend door is shot
SOURCE: 2004 chevrolet suburban AC blows hot/cold at same time
You need to replace the drivers side temp actuator that is located on the left side of the HVAC box. It is retained by 3 screws and is fairly easy to replace.
SOURCE: I have a 2004 Lincoln LS and it blows cold air on
It is probably the (DCCV) Dual climate control valve. It is located RT front of engine with heater hoses and wires goin to it. I ordered one from Rockauto.com for about a $100.00 i think. It is pretty easy to change and I found out when mine went out that it was a very common problem with these cars. When mine quit it started the same as you are describing for a while then it only would blow hot air and it blew the a/c compressor fuse. The DCCV is a dual cylinder valve and i beleive that they get stuck open and short out. If you have any more questions or need more information let me know.
SOURCE: Dual Temperature controls inside - 2002 lincoln ls
The problem is most likely a bad dual climate control valve. This component is located on the right side near the radiator under the hood. It will have several coolant hoses hooked to it and 2 silver cylinders protruding from it. You can clamp off the heater hoses at the heater core and see if both sides cool then and this will tell you that the valve is letting coolant thru when it shouldn't be.
This will narrow it down to either the valve or the control head inside the car,or wiring in between them. The only way to narrow it down further is if you have a scan tool that could access the climate control data. Have seen several of these valves cause this concern and have only seen one control head cause it.
SOURCE: 2005 tahoe a/c blowing hot air on driver side
There is a actuator motor that controls this,and it is not working,unfortunately ,the whole dash has to be removed to replace the actuator motor.If this was at all helpful,please rate,thank you.
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