Front climate control module

2002 CHEVROLET SUBURBAN
100,000 MILES • 0.5L • V8 • 4WD • AUTOMATIC
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EL REY CHAMP BECERRA
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on my SUV when I turn on and select "defrost" air comes out of the front vents, when I choose front vents on the climate control air only come out of the defrost vents?
Oct 9, 2020 at 8:15 AM
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KASEKENNY
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You are correct that this is most likely the control module. However, we need to check the operation of the mode door actuator just to make sure it is operating. However, if you are commanding it to defrost and the actuator is moving in the opposite direction then the control module is the issue as the actuator just moves in the direction that it is told. The easiest way to check the actuator is to swap it with another door because they appear to all be the same.

From there we need to replace the control module. I attached the info for your review. Let me know what you have questions on. Thanks
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Oct 9, 2020 at 6:25 PM
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EL REY CHAMP BECERRA
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Thank you for the advice! Funny thing happened over the weekend I had to disconnect the battery and this morning when I turned it on it seems it is working now.
Oct 12, 2020 at 9:46 AM
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KASEKENNY
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That is great. Thanks for the update. Please come back to 2CarPros next time. Thanks
Oct 13, 2020 at 5:48 PM