I have a 2003 expedition, the front ac cools but the rear ac doesn’t. I checked the rear ac lines and they are cold but no cold air from the vents. I already replaced the ac heater blend door actuator but still no cold air

 

But there is air flow blowing from the roof vents ? I wonder if the blend door shaft is stripped out where the actuator attaches? When you replaced the actuator did you remove the rear quarter panel? Or did you just do it through the opening it the top? You might pull the actuator back out and test it's function with it plugged in and see if it's shaft does in fact rotate when you move the temperature selector in the overhead console.

 

Did you replace one or both rear actuators?

 

I replaced both actuators and they seem to be working good. Their is air flow from the roof vents, I manually tested both actuator door panels and they work.the heater works so I know the actuator that controls temperature is working

 

i replaced both of them

 

yes their is air flow from the roof vents. And I had already done what you suggested, I checked to make sure the actuators where not faulty by changing the temperature on the top **** and they work. I also manually tested the doors that the actuators move and they work

 

I pulled everything apart and one of the lines is really cold but the evaporator doesn’t get cool

 

I have a 03 expedition , ive replaced both actuators and rear air hot or cold does no blow any ideas, front works fine

 

Luis, my guess is the rear expansion valve is clogged.( It regulates the flow through the evaporator....).
If the line is cold but the evaporator itself is not getting cold look at the expansion valve in the line there.
You do have to empty and vacuum, and recharge the system when the new expansion valve is installed.
You'll have to take the rear quarter trim panel off again, but that should be it.
If the inlet line is cold, and the outlet line is not, that's your problem.
You can blow out the evaporator when you remove the valve just to check airflow through that, but it's usually just the valve itself that gets clogged or damaged.

AC Rear Expansion valves at Rock Auto

 

Do you mean the rear fan doesn't blow any air out?

 

nothing i don't hear or feel anything , i havent checked if the inlet line is cold and outlet is not , im just getting info to see what i need to do to get it running normal .

 

thanks , now will this issue not run at all i have not air in the rear top or bottom i dont even hear the rear system go on at all

 

First thing to do is test for power at the rear blower motor. If there is power then the blower motor is bad.

 

You should've started your own thread, not broke into someone else's with a different problem.