I did a search and it seems that this is the default if there is a problem. I am going to assume that just replacing the controller is the first step, but what exactly would I replcae? Do I replace the entire control that holds the heat lever and control lever, of can I just replace one of the components therein. Where would I find either of these?

 

99% of the time, it will just be a vaccuum hose disconnected somewhere.

 

I jumped to conclusions and went oh my HVAC controller must be bad when i only had defrost- got a new one- and was pretty pissed when i saw behind the controller the vacume lines were disconnected- damn owner that had my car befor me

 

follow the vacuum line where it comes out of firewall and goes to the canister and you should find the problem.

 

where it goes to the canister? what canister is that, the AC one in the engine bay?

 

It would seem that all the hoses are connected into the heater controls. I think the thing that the hoses are connected to is broken though because it makes this hissing sound, letting air in.