Inside of your HVAC unit are vent doors along with vacuum lines and a block of vacuum solenoids.
Your issue lies with one of these components. The only way to check is to remove the unit and check. If you're interested in doing this yourself, let me know and I'll walk you through it. If you just need advise for dealing with a shop, I can help with that also.
Wednesday, November 17th, 2010 AT 3:05 PM