A/C stuck on floor/defrost

2004 OLDSMOBILE ALERO

158,983 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC

CHILIBOI44

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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.

Jul 22, 2021 at 10:54 AM

SQM

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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.

Images (Click to enlarge)

Jul 22, 2021 at 11:35 AM