I have a 2008 dodge ram 1500. The **** for the vent mode is loose and by feel, I can tell it does not catch any of the modes. Air comes out of the defrost and floor vents only, with residual air coming out the dash vents. Also the temperature doesn't switch over on command and works intermittently. Right now it's stuck on cold. It seems as if it turns on to the temperature I want when it feels like it (it could take months). This past summer, it turned over to a/c 2 days into a heat wave in July now it's stuck on a/c mode when in fact, I have the temperature on hot. Any idea what the problem /problems could be?

 

Sorry, but you need to buy a manual.

 

Could be a bad control head or blend door actuators.