Does it do the same thing if you select the defrost or dash vents while in heater mode? Do you hear any hissing from the control panel area while in A/C mode?
July, 4, 2008 AT 4:58 AM
No hissing sound heard. And air blows to defrost and floor regardless of selection.
July, 4, 2008 AT 3:14 PM
Ok, Open the hood and look for a vacuum line that runs back to the dash. Follow that line and see if it is split/cracked or disconnected. That line feeds the control panel. It goes to a T in the line that connects to the vacuum reservoir. That reservoir has a check valve in it that may have failed. Follow the other line off the reservoir back to the engine, it will connect to a port on the intake manifold. That is the same line that actuates the 4X4 as well. So check that mess of vacuum lines for a leak as well.
July, 7, 2008 AT 8:40 AM
Thanks for the tip. I'll be checking the line in the next couple days.