A/C coming out of the defroster

[BruceJ]

Could somebody give me a little advise on how to stop the A/C from coming out of the defroster. This is a 1998 corvette with climate control. I have looked for vacuum lines removed the glove box and can't find my problem. I looked on line and it says that the HVAc vacuum line is in the back of the engine. Even with a mirror i can't see anything.any advise will be a lot of help
:duh

 

[Tom Bryant]

I moved your question to the C5 Tech discussion forum for better exposure.

Tom

 

[hoosierdaddy]

Welcome to Corvette Action Center

Even though I may not be able to help you with your AC problem, and have to assume that heater functions the same way or have you tired that, do you have floor, vent, etc working! It is all individual buttons for the mode, assumed those were controlled electronically, then to a vacuum source, not sure here!! Not as simple as saying here is your problem! I would have to have the repair manual with diagrams and schematics to run this problem down no doubt! It becomes the process of elimination as much as anything. But did want to welcome you aboard. And maybe someone more versed than I will chime in with some direction as well. Good luck

-Bill

 

[dadaroo]

Sounds like a vacuum line problem if defroster is not selected. Normally this happens when battery acid gets on the small plastic tube that feeds the HVAC controls in the car.

Have you done any work associated with the intake manifold lately.

Here is some info that might help.


When Air Comes Out of All AC Vents - A How To Fix Write Up with Pics! - Corvette Forum



HVAC Issue: Diagnosis? - Corvette Forum


Vacuum leak from Intake Manifold - Corvette Forum


Mr. Sam