AC Switch Question

[Tincup703]

I believe I have a vacuum issue with the AC selector switch. All of a sudden the switch stopped working. Now when I turn on the AC it only comes out the defroster and will not blow out the vents regardless of where the switch is set.

Anyone ever have this problem? Any suggestions?

 

[Tx_Atty]

you are probably right - I just recently did the AC mod on mine and had a leak that did hte same thing. You will need to look under the dash and follow all the lines to make sure none have popped off their connectors. What year truck do you have? SDs have some connections behind the glove box but OBS has them all under the dash from the middle over to the passenger side.