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Discussion Starter #21
Do you have a Tech II? Have you reassembled the passenger side?

If the motor is still visible, you could try changing the temp settings and see what the motor does.

No, state of A/C charge won't show up as blend door errors in ACC anyway. And it manifests itself as insufficient cooling on the driver's side in hot weather.
Don't have a tech 2. I'll look at the motors when I change temp.

Insufficient cooling on the driver's side is exactly what happens in summer!
 

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Discussion Starter #22
Do you have a Tech II? Have you reassembled the passenger side?

If the motor is still visible, you could try changing the temp settings and see what the motor does.

No, state of A/C charge won't show up as blend door errors in ACC anyway. And it manifests itself as insufficient cooling on the driver's side in hot weather.
When I change temperature, what should I see?
 

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I forget how much you can see with the motor installed, but there should be indications that the motor is turning. I don't know if it's sensible to pull the motor off to watch it turn. It was a real pain to get the motor back onto the door shaft on the driver's side with its lousy access. I struggled for an hour, then disassembled and reclocked the motor a wee bit and got it back on.

For summer, my A/C charge was quite low. The compressor still ran, and the passenger side was pretty cold. The driver's side struggled to stay coolish. After replacing the motor with no change, further checking showed a likely low charge (there are pressure readings you can get in Tech II that will give you the pressure with the system off). Shop replaced a leaky hose, charged it properly by weight, and the driver side stayed as cold as the passenger side.
 

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Discussion Starter #24
Ok, 1st test, watching the passenger side step motors as I moved the temperature up and down only the one of the rods moved (closest to the center console) The other did not move at all. Manifested by warm air on right passenger vent blowing warm and passenger vent on left blowing cool. Ideas? I'm moving on to replace the driver's step motor. Wish me luck! Glad I've been doing yoga!
 

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As I recall, the passenger side motor runs two flaps, for the front and the back. There's a long link arm connecting the two. You should check your WIS for details. It does sound like the motor works.

When you change interior temperature, do you hear any clicks from under the dash on the driver's side?

Good luck, this is one of those jobs that you don't want to do for fun, you want to do because it definitely will fix things.
 

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Just to confirm, did you also replace the armature to the stepper motor? is it plastic and short (about 1/4 inch)? or is the arm that fits into the cracked blend door shaft longer (say an inch or more (i dont recall exactly how long)? (it may be longer if the replacement motor you have is post 2006 (i think thats when they made them longer from factory)

Generally its not the motor, but the connection between motor and blend door shaft that needs addressing, You mentioned you did see a crack in the blend door shaft collar... but I dont see mention of a kit or upgrade part to address that, so just want to make sure that has been addressed as well as the replacement motor.

the rods that move or dont move have to do with distribution of air flow, not blending of air temp.

hope the yoga helps! good luck
 

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Discussion Starter #27
I second EdT again here:

and note*** I have an acc that wont clear the 08, 11 codes, nor the tech 2 codes when i read the body codes with that, but the stepper motors and blend door arms are fine and work. verified by: tech 2 readings; seeing the motor engaging the flaps and watching; my saab indy mechanic (who says he doesnt have the foggiest idea why the codes keep showing even though everything works)

on that car it drove me nuts getting the codes, and going under the footwells 5 or six times to look at everything scratch my head and wonder....

after three seasons i finally let it go and trust the tech 2 readings, my own vision and my mechanic, that problem is resolved, even if the codes remain.... weird. (i have a theory (has to do with the wierd mid year armature designs) but no need to muddle this post up more with describing it)

not sure if you have tested the system for functionality or just did the acc reset.... if you haven't tested the functionality yet, give it a try... it may have been resolved? (and just have a wonky acc unit like mine that will keep throwing the codes)

maybe i am more forgiving with all this as my 9000 goes through like 2-3 acc units a year (25 year old electronics) (some work in winter but not summer, and some in summer but not winter etc....so i swap them out accordingly...)
Ok! Problem solved. The driver's side step motor had a broken shaft! All's working right now. Funny enough the ACC unit is still showing 2 codes, 8 and 11! I don't care, I know have proper heat and cold. Thanks for ALL your help especially the correct part numbers. I'm keeping the car! Yeah! Now on to the twice unit!
 
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