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Durkin Tactical Franklin Armory
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Posted: 8/22/2017 6:15:06 PM EDT
I have a 2012 GMC Sierra.  My CD player went rogue and decided to keep trying to eject a disc that wasn't there, which killed the battery.  I jumped it today and cranked it up, and noticed the A/C on the driver's side is blowing hot no matter what it is set at.  The passenger side can be adjusted and blows cold, but the driver's side stays hot.  Any idea what may be causing this?  I'm guessing it had something to do with the battery dying and being jumped.
Link Posted: 8/22/2017 7:09:31 PM EDT
you have to check the blend door.
either a vacuum line died or the pot is electric controled and is locked in place.
Link Posted: 8/22/2017 7:11:44 PM EDT
Blend door motor.
Link Posted: 8/22/2017 7:13:13 PM EDT
My 09 trailblazer does the same thing on occasion but the passenger side.
Link Posted: 8/22/2017 7:14:05 PM EDT
x3 on blend door.
Link Posted: 8/22/2017 8:42:58 PM EDT
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x3 on blend door.
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Link Posted: 8/22/2017 9:23:18 PM EDT
Blend door actuator. With what you describe I would try re calibrating the actuator with a Tech 2 before digging it out. Calibration takes a couple of minutes.
Link Posted: 8/23/2017 11:00:54 PM EDT
could be out of calibration blend door

could be just low on refrigerant
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