AC blows cool air on passenger vents/warm air on drivers side. on 2000 Buick LeSabre

Airconditioner blows cool air, but the cools air only blows out the vents on the passenger side. All the vents on the driver's side blows warm air. This is with the settings on "AC" or "Max AC". Can anyone tell me what is going on?

Asked by for the 2000 Buick LeSabre
Really need to have your Climate Control inspected. There is most likely a blend door that is not working correctly.
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