AC Problems - Help
Thread Starter
Team Owner
Joined: Sep 1999
Posts: 34,062
Likes: 4
From: Evans, GA
AC Problems - Help
A couple of weeks ago, posted about a problem with delayed AC cold air blowing from the mid level ducts along the IP both left and right.
New information: Air has stopped blowing from the mid line ducts, into your face, and the outside temperture stays at 74 degrees.
The blower changes output when the selector buttons are depressed but air never comes from the mid level ducts. Plenty of air from the defroster and foot level. You cannot hear any changes from the duct doors as you select different settings.
Any ideas or solutions, please.?
New information: Air has stopped blowing from the mid line ducts, into your face, and the outside temperture stays at 74 degrees.
The blower changes output when the selector buttons are depressed but air never comes from the mid level ducts. Plenty of air from the defroster and foot level. You cannot hear any changes from the duct doors as you select different settings.
Any ideas or solutions, please.?
Safety Car
Joined: May 1999
Posts: 4,445
Likes: 0
From: Mandeville, Louisiana
Re: AC Problems - Help (1Patriot)
Have you tried "resetting" the AC program as described in the owner's manual? There are a couple fuses to pull for a minute, I forget what two fuses. Read the Owner's Manual...its in there. That may help.
Burning Brakes
Joined: Dec 2000
Posts: 849
Likes: 0
From: Lafayette LA
Re: AC Problems - Help (1Patriot)
There is a plastic fitting under the passenger side fuel rail cover. It has 3 small vacuum lines connected to it. If you are lucky it will be cracked or melted - usually under the bottom where you can't see it.
If you are not lucky, it is most likely the controller box under the dash above the accelerator petal. Could be a number of other things, but that is the most probable.
A friend has one at the dealer with the same problem. Email me in a few days and I'll let you know what they found.
If you are not lucky, it is most likely the controller box under the dash above the accelerator petal. Could be a number of other things, but that is the most probable.
A friend has one at the dealer with the same problem. Email me in a few days and I'll let you know what they found.
Thread Starter
Team Owner
Joined: Sep 1999
Posts: 34,062
Likes: 4
From: Evans, GA
Re: AC Problems - Help (olephart)
olephart,
I found the vacumn valve you are talking about on the pass side of the engine. and the fitting on the side was broken. I have replaced that valve today (8 plus $$) with no change to the AC problem. According to the book, the cruise control works and the AC vacumn source and the CC are the same split line under the hood on the driver's side near the CC unit.
Today, after driving for 10 minutes the air slowly started to blow from the center vents. However, after turning the motor off and restarting, another 5-8 minute delay was encountered before the air switched to the mid line vents. Before this problem started, you could hear the damper doors whn the activated; now you cannot hear the doors move.
Will send E-mail later, thabks for the assistance.
[Modified by 1Patriot, 12:04 AM 6/4/2002]
I found the vacumn valve you are talking about on the pass side of the engine. and the fitting on the side was broken. I have replaced that valve today (8 plus $$) with no change to the AC problem. According to the book, the cruise control works and the AC vacumn source and the CC are the same split line under the hood on the driver's side near the CC unit.
Today, after driving for 10 minutes the air slowly started to blow from the center vents. However, after turning the motor off and restarting, another 5-8 minute delay was encountered before the air switched to the mid line vents. Before this problem started, you could hear the damper doors whn the activated; now you cannot hear the doors move.
Will send E-mail later, thabks for the assistance.
[Modified by 1Patriot, 12:04 AM 6/4/2002]
Burning Brakes
Joined: Dec 2000
Posts: 849
Likes: 0
From: Lafayette LA
Re: AC Problems - Help (1Patriot)
The easy stuff never seems to work. If you want to test the controller, you need a "jumper" line. Just run it from the vacuum input line for the controller to the line that goes from the controller to the valve that redirects the air up to the vents. If the valve opens and the air starts going through the vents, then the controller is bad.
If you have good vacuum and the valve does not open, then it is probably the valve.
I think there are more suspects and more to test, but I am told this is the most common and, therefore, the place to start.
The intermittant operating that you are experiencing is part of the failure mode - it won't get better for long.
good luck.
[Modified by olephart, 3:26 PM 6/3/2002]
If you have good vacuum and the valve does not open, then it is probably the valve.
I think there are more suspects and more to test, but I am told this is the most common and, therefore, the place to start.
The intermittant operating that you are experiencing is part of the failure mode - it won't get better for long.
good luck.
[Modified by olephart, 3:26 PM 6/3/2002]
