Also how old are the vacuum lines on the car. I replaced all of mine as they appeared dried out and some were rotted. It can't hurt to replace them now if you haven't before.
cruise / ac vent problem
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From: warren ohio
cruise / ac vent problem
Need a little help with my problem guys. A little background on the problem, cruise would not work 2 times last year but operated properly the rest of the time. Don't hardly use the ac on the car as its a vert.
Current problem is cruise will not engage at all now and when I use the ac I could not get anything out of the vents on the dash. Air would come out of the defroster vent and out of the floor vent but not out of the dash vents. Any help on where to look would be appreciated, could these two issues be caused by the same problem? 61,000 miles on car.
thanks
lvm94 vert
Current problem is cruise will not engage at all now and when I use the ac I could not get anything out of the vents on the dash. Air would come out of the defroster vent and out of the floor vent but not out of the dash vents. Any help on where to look would be appreciated, could these two issues be caused by the same problem? 61,000 miles on car.
thanks
lvm94 vert
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From: warren ohio
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From: warren ohio
Thank you for help with this problem, it certainly appears to be it.
This forum is the greatest.
lvm94vert
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From: warren ohio
I hope this fix also fixes my ac vent problem since both hoses were not getting the vacumn.
Thanks a lot for the advice
lvm94vert
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Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Found some part numbers in an old thread - GM #15-5421 or 10135692. Someone also posted up the number for the 'help' section at Advance Auto, but I can't find the link. Glad it is an easy fix for you.
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From: warren ohio
Poring down rain so have to wait to see if both problems are solved when I can get it out for a spin.
Thanks again
lvm94
Racer
Joined: Feb 2004
Posts: 345
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From: Sicklerville NJ.
St. Jude Donor '13-'14-'15-'16
I have same problem with a/c not changing over to center ducts. Is this vacuum fitting the possible culprit ? Going to check mine tomorrow. Was going to start with previous post (a/c heater temperature valve actuator) idea because I had heard they tend to go bad & are a discontinued part from GM.& I believe they said located under dash at your right knee if I remember correctly. Great forum !!!
Drifting
Joined: Jul 2009
Posts: 1,258
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
Here is the valve that advance auto has http://shop.advanceautoparts.com/web...rm=check+valve
My valve is located next to the upper intake on the drivers side, I have a 1990 C4. The valve seems fine and I have the same problem air out the defrost and under the dash so my next step is the climate control or actuator.
My valve is located next to the upper intake on the drivers side, I have a 1990 C4. The valve seems fine and I have the same problem air out the defrost and under the dash so my next step is the climate control or actuator.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
I have same problem with a/c not changing over to center ducts. Is this vacuum fitting the possible culprit ? Going to check mine tomorrow. Was going to start with previous post (a/c heater temperature valve actuator) idea because I had heard they tend to go bad & are a discontinued part from GM.& I believe they said located under dash at your right knee if I remember correctly. Great forum !!!
Racer
Joined: Feb 2004
Posts: 345
Likes: 0
From: Sicklerville NJ.
St. Jude Donor '13-'14-'15-'16
