heater controll valve vacuum.

[jarfly]

Fast question, Where does the vacuum off the heater valve go to? My truck is throwing a vacuum code and got to thinking I don't have this hook up So were does the line connect to the motor?

 

[jarfly]

ok got to looking and looks like another vacuum line comes out from below the heater box on the 02, im assumeing this has something to do with the ac? My truck does not have ac, by leavein the valve unhooked will this cause any problems?

 

[RonD]

Plug the line.
There should be no unhooked lines if your truck didn't come with A/C then that line wouldn't be for A/C