DenaliDoofus
TYF Newbie
- Joined
- Mar 20, 2025
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TLDR: Recirculator door "works" when I do the reset (it moves back and forth during calibration), but when I press the button, the recirc door doesn't open and stays in vent mode. Light turns on and stays on, but door physically doesn't open
Longer Version:
Recently picked up a 2005 Yukon XL Denali and the AC seems to be stuck on vent and won't go recirculate air (even when the button is pushed and light is on). I was able to get in and replace the recirculator door actuator (man was that a challenge), but it still didn't seem to work. When I was replacing the actuator, I moved the door to see if it might be stuck like I'd seen on other threads about the door getting stuck and while it was a bit stiff, it did move freely.
After I replaced the actuator, I cleared the codes and did the "reset/calibration" (remove the fuse, wait, turn back on, wait) and during the recalibration process, I can see the recirculator door move back and forth on its own. However, when I go to put it in recirculate mode under normal use (press the recirc button), the light will turn on, but using a boroscope, the blend door doesn't actually move and stays on vent mode. The light does stay on and doesn't blink at all; I moved it into defrost mode and tried to recirculate, but it will blink to show the mode isn't compatible, and when I move it to blow on the face like normal, recircualtor still wont work.
I feel like I'm 85% the way there; the computer can move the door like it does during the reclibration, but I still can't make it work. If someone can please help me with figuring out how to actually recirculate, I would greatly appreciative it!
Longer Version:
Recently picked up a 2005 Yukon XL Denali and the AC seems to be stuck on vent and won't go recirculate air (even when the button is pushed and light is on). I was able to get in and replace the recirculator door actuator (man was that a challenge), but it still didn't seem to work. When I was replacing the actuator, I moved the door to see if it might be stuck like I'd seen on other threads about the door getting stuck and while it was a bit stiff, it did move freely.
After I replaced the actuator, I cleared the codes and did the "reset/calibration" (remove the fuse, wait, turn back on, wait) and during the recalibration process, I can see the recirculator door move back and forth on its own. However, when I go to put it in recirculate mode under normal use (press the recirc button), the light will turn on, but using a boroscope, the blend door doesn't actually move and stays on vent mode. The light does stay on and doesn't blink at all; I moved it into defrost mode and tried to recirculate, but it will blink to show the mode isn't compatible, and when I move it to blow on the face like normal, recircualtor still wont work.
I feel like I'm 85% the way there; the computer can move the door like it does during the reclibration, but I still can't make it work. If someone can please help me with figuring out how to actually recirculate, I would greatly appreciative it!
