DODGE RAM NOT WORKING

Control Not Working Won't Change A/c To Heat.

Hey, I'm Curious To What Is Going On With My Hvac Unit. I Can't Turn The Heat Or A/c On And I Can't Switch Where It Will Blow....

Cannot Change Temperature Selector Will Rotate (from Cold To Hot), But Will Spring Back When Released. Feels Like It Is Either Spring-...

I Disassembled The Dashboard To Replace Heater Core. The Hvac System Worked Before I Took It Apart, But Now The Whole System Is Dead. It...