97 chevy blazer vent selection problems?

Tanman

New member
I have a 97 chevy blazer, 4dr 4x4. It has just the standard 2 wheels to select the temperature and then to select where you want the air to come out at. It works fine and dandy like it should, but if I want the air to come out of the top vents at your face, It kicks it out of the defrost at the winshield. It does this any selection you choose, except for if you crank it all the way to the right first to defrost, then go one by one from there to the desired selection. I know it's not suppose to do this, so I was wondering what could cause this? Any help is much appreciated! Thank you!!
 
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