AC AIR FLOW CONTROL PROBLEM
Thread Starter
Instructor
Joined: Jun 2003
Posts: 128
Likes: 0
From: tampa fl
AC AIR FLOW CONTROL PROBLEM
Here it is AC blows through the defoster all the time no matter what postion it is set in and I can't seem to change the temp setting, any thoughts would help.
Thanks
ROCKY85 :crazy: :crazy:
Thanks
ROCKY85 :crazy: :crazy:
Drifting
Joined: Aug 2001
Posts: 1,582
Likes: 0
From: Newark Ohio
Re: AC AIR FLOW CONTROL PROBLEM (ROCKY85)
my '96 was the same when i got it. if you have the electronic controls it's probably the same problem. the control module under the drivers side dash has both electical & vacuum connections on it. i reseated all these and it's been fine since. there are some previos articles about it on the board. try a search.
Burning Brakes
Joined: Dec 2001
Posts: 777
Likes: 1
From: Fort Worth Texas
Re: AC AIR FLOW CONTROL PROBLEM (bigdan)
My 96 LT4 is doing the same thing. A Corvette tech asked if my cruise control worked (yes) he said that there is a vacuum leak. So I checked the lines on the intake under the covers and no leak. Now the cruse control is not working(months later). How much troble was it to get to the controller under the dash as I do not have the factory shop manuel??? As the dealer said the controller is about $400.00 plus labor. I was hoping that a vacuum line is off or leaking.HELP I could not find where this topic was addressed. :confused:
Team Owner
Joined: Sep 1999
Posts: 34,062
Likes: 4
From: Evans, GA
Re: AC AIR FLOW CONTROL PROBLEM (ROCKY85)
If you have the C68, Automated Climate control, in your car, thr most probable solution is to replace the AC Programmer located above the gas pedal under the dash. There is one screw that holds it in. And plugs for the wires and vacumn lines, but you need to remove the trim and shell from under the steering wheel on the driver's side. there is 3 or 4 scres and bolts then you can access the AC Programmer. Get a rebuilt one for approximately $200 from the Last Detail or one from Superior Chev for approx $368 plus shipping after the return of the core ($50.00).
Hope you are not old and inflexible, reaching the component is a true pain.
Hope you are not old and inflexible, reaching the component is a true pain.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: AC AIR FLOW CONTROL PROBLEM (ROCKY85)
GM a/c applies vacuum at all times to the defroster door. If there's no vacuum, position is relaxed and defrost is all you get. Check vacuum source. It is generally through a check valve shared with cruise to the rear and on the left side of the engine. A bad check valve will cause loss of a/c vacuum. A bad vacuum tank (left headlight well) can also be a problem, though this usually effects cruise more than a/c. Vacuum source is either connected to the dash (manual air) or programmer (electronic air above the accelerator). If you have vacuum at either, then the programmer or dash assembly is probably bad.
Drifting
Joined: Aug 2001
Posts: 1,582
Likes: 0
From: Newark Ohio
Re: AC AIR FLOW CONTROL PROBLEM (1Patriot)
If you have the C68, Automated Climate control, in your car, thr most probable solution is to replace the AC Programmer located above the gas pedal under the dash. There is one screw that holds it in. And plugs for the wires and vacumn lines, but you need to remove the trim and shell from under the steering wheel on the driver's side. there is 3 or 4 scres and bolts then you can access the AC Programmer. Get a rebuilt one for approximately $200 from the Last Detail or one from Superior Chev for approx $368 plus shipping after the return of the core ($50.00).
Hope you are not old and inflexible, reaching the component is a true pain.
Hope you are not old and inflexible, reaching the component is a true pain.
