Driver two vent blowing hot air while passenger two vent blowing cold air? on 2008 Chevrolet Suburban 1500

Tried all different settings on air conditioner and heat controls and nothing seems to work. Any suggestions on what this might be?

Asked by for the 2008 Chevrolet Suburban 1500
2 answers 1 comment
hi available?
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HVAC system can be scanned for codes, best place to start.