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Old 12-08-2018, 01:19 PM   #1
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Join Date: Dec 2018
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Default HVAC stuck in default mode(defrost only )

What started off as my heat only blowing on the face vents, now the system is in default.
I replaced the mode actuator with a GM one and tried to calibrate it and after installation it only goes to defrost.
I thought it might be a bad control panel bought one and now when you plug the new one in, it cycles thru all the cycles and Then goes on back to default.
At first I was getting a BCM code of a aspritator only to find out mine was unplugged. I plug it in and now the code is gone but still only defrost...
Has anyone experienced this before. I am completely lost right now and I even had a friend from Chevy look at it on a GM scanner. He manually opened all the blend doors and when you shut the truck off back into default...

Last edited by Whitelx1; Yesterday at 03:19 AM.
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