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A/C stuck on floor/defrost

Tiny
CHILIBOI44
  • MEMBER
  • 2004 OLDSMOBILE ALERO
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 158,983 MILES
My car's A/C has been stuck on the floor/defrost setting for a few months. When I turn the knob, it's loose and doesn't change where the air blows.
Thursday, July 22nd, 2021 AT 10:54 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like your mode door actuator is probably faulty.
The mode door actuator controls where to direct the airflow after your select it on the dash.
Many of these GM vehicles mode door typically fails on the floor/defrost setting.

https://youtu.be/Eqf-H3COtSo

I have attached replacement procedure for the mode door actuator.

Please let me know of any questions.

Thank you.
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Thursday, July 22nd, 2021 AT 11:35 AM

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