I have a 96 E320 that is blowing warm/hot air from the drivers side vents, and blowing ice cold from the passenger side vents.

I have searched and read every post here about it and have already preformed the following tasks:

1. I did the diagnostics on the AC through the onboard computer (by way of the AC display). Everything was fine.

2. I did the error check through the onboard computer and there were no errors (by way of the AC display).

3. Recharged the freon to the maximum capacity. There is no hissing noise behind the vents to indicate low freon. (dont know if freon is the right word - but had this step done professionally so I dont know what to call it).

4. I opened up the Duovalve and cleaned it and put it back together. It looked to be in pristine condition when I opened it but lubed it up anyway.

5. I discovered the flap test outlined at continental imports site and ran through it and I think it failed all over the place.

Just fyi - these are my diagnostic values:

1. 41
2. 40
3. 24
4. 25
5. 25
6. 88
7. 13
8. 52

I see in a lot of places how to test and evaluate the flaps - but nowhere how to fix them. I failed lots of the flap tests, including left and right diverter flaps and left and right blend flaps. Any leads on repairs to flaps?

Still no good results. The problem is intermittent which drives me further insane. When it is hot outside, and when I am driving at 30MPH+ it is the worst. When I am idling it seems to work better, but at its best it is still at least 5 degrees warmer on the drivers vents than passenger vents. At its worst, the drivers blows HOT and the passenger is COLD.

Could the problem be with the vacuum or the vacuum switchover block?

I live in Florida and dont care if I never have heat available to me so if there is a solution that would involve me locking something open to only allow cold air that is fine with me.

ANY SUGGESIONS?

I APPRECIATE ANY HELP OR SUGGESTIONS - I AM GOING CRAZY WITH THIS!!!