I have heat on passenger side of 2008 dodge ram 1500 4.7. AC works great. Luke warm heat on driver side on cabin and floor mode. Defrost has heat on both sides. Recirculation seems to be working as I'll use it to warm truck faster until windshield fogs up and then back to defrost. I'm guessing it might be a blend door but not sure which one or where it might be at. Anyone else has this problem?