My 2003 Grand Prix has a problem with the ac, it blows cold on the passenger side but not the driver side. Its not real hot but its noticeably warmer than the other side and sucks on hot days!

I checked the Blend door motor. The motor is good, so I manually moved the door to the cold position. Still the same temp as before.

I put a new climate control in it, and still the not working right. https://www.rockauto.com/dbphp/x,car...C_Control.html

Any ideas of what else it could be?

Could be low on the refrigerant charge.

Nope just charged it

I see from the picture of the controller you bought on Rock Auto you have dual zone control ... driver and passenger. That means you have blend doors on either side, as well as the one that mixes incoming air. Have you checked them all?

The i only checked the one on the hot side(driver side). The passenger side one is the right temp so i didnt check it.

you check the cabin air filter, clean the condenser? any lack of efficiency can cause this too. the rad and condenser need cleaned every once in a while like a house but your car is subject to way more dust, pollen etc. take the fans out back flush it with a garden hose and spray some simple green on it let it sit and rinse, repeat if it doesnt come out clean

brand new cabin air filter from a few months ago. I'll check the condenser in a little bit

condenser is clean still the same problem

probably what roy said would be next to check, thats the vacuum one though. you checked and the driver side moves when you move it cold to hot? what about the one that makes change from vents to defrost. no vacuum leaks anywhere?

the driver side does move fine and the one that changes it from vents to defrost also works fine. and no vacuum leaks any where that i know of.