94LuminaZ34 Posted November 15, 2008 Report Share Posted November 15, 2008 I just bought a 1994 Lumina Z34 with a 3.4L engine and Im in the process of getting it road ready but it has some problems so I hope someone can help me. It has a push button hvac panel and when I turn the ignition on the fan starts and keeps running but only blows from the defrost and bottom vents, if I push the off button the button will light up and the motor will stop untill I remove my finger then the fan starts again? All of the buttons work this way, they only work as long as I have my finger on them? It will blow air from the vents but again only when I have my finger on the vent button, also when I remove my finger I hear a hiss for about a split second. Has anyone else had this problem? Could it be the panel or a vacuum leak? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted November 15, 2008 Report Share Posted November 15, 2008 sounds like the HVAC panel itself is shot. the buttons should click and stay in place when pressed. that will also account for the fan running at turn on. it is easy to replace. Quote Link to comment Share on other sites More sharing options...
94LuminaZ34 Posted November 23, 2008 Author Report Share Posted November 23, 2008 Its was the panel. I went to the wrecking yard and pulled one off a euro and it works, now I dont have to hold the buttons down with toothpicks. The only difference between the one I had and the one I got is the one from the euro has a button for a rear window defroster that I dont have on my Z34 but it plugged in and works great. Thanks for the help Quote Link to comment Share on other sites More sharing options...
1990lumina Posted November 23, 2008 Report Share Posted November 23, 2008 Cool. I still can believe some cars are manufactured without rear defrost. I live a sheltered life I guess lol. Quote Link to comment Share on other sites More sharing options...
rockfangd Posted November 24, 2008 Report Share Posted November 24, 2008 I never really liked the luminas hvac setup for those years. So many problems lol. As for the rear defrost i have seen many soutern cars without it. They dont need it lol Quote Link to comment Share on other sites More sharing options...
3pt1lumina Posted November 25, 2008 Report Share Posted November 25, 2008 Seeing a car without rear defrost is weird for me too.. Quote Link to comment Share on other sites More sharing options...
carkhz316 Posted November 25, 2008 Report Share Posted November 25, 2008 I never really liked the luminas hvac setup for those years. X2 FTL, that damn reach!! Quote Link to comment Share on other sites More sharing options...
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