Heat and ac in my hundai azera

H This is Baker1 , from New Jersey ( I bake cakes) my Hundai Azera 2009, was blowing heat on both side of a “dual system” during the cold months. Now that its warm weather when I turn on the A/C it blows cold on driver side vents , but hot air on passenger side. What do I need to correct this.

H This is Baker1 , from New Jersey ( I bake cakes) my Hundai Azera 2009, was blowing heat on both side of a “dual system” during the cold months. Now that its warm weather when I turn on the A/C it blows cold on driver side vents , but hot air on passenger side. What do I need to correct this.

Usually there is little motors that direct the flow of air and set the mix. You probably have one that has died.