Dual auto climate control always blowing near max fan

bcrawfo2bcrawfo2 Member Posts: 8
edited May 2016 in GMC
I have the dual auto climate control, where the driver and passenger can set their individual temps. It's been working great. I've replaced blend doors to fix one side getting hot air or the other. The last few weeks it's not responding to temp changes via the control. I can set it for 80 or 60 and it still blows cold air at 3/4 of full fan speed.
Tonight I pulled the AC fuse and waited a minute...then put it back in. Then put the key in the on position to let it calibrate. Still doing the same thing.

Ideas?
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