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Topic: A/C blowing out of defrost and heater vents

in Forum: C4 Interior

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A/C blowing out of defrost and heater vents

Posted: 6/22/17 4:47pm Message 1 of 4
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vettish95
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Santee, CA - USA
Joined: 5/14/2017
Posts: 1
Vette(s): 1996 Coupe. I have owned a 1979, a 1987 convertible, and a 1995 coupe
Hi folks.
I am told that the a/c programing module could be bad causing the air to blow out of the wrong vents.  Any ideas of anything else it could be.  Blows cold just not out of the dash vents



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Re: A/C blowing out of defrost and heater vents

Posted: 6/23/17 1:21pm Message 2 of 4
Black Shark
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Joined: 3/20/2009
Posts: 611
Vette(s): Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe
did you check the vent doors for vacuum leaks?
also check for a broken vacuum line at the vent doors or at selector switch/plate



Re: A/C blowing out of defrost and heater vents

Posted: 6/25/17 9:00am Message 3 of 4
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russ1953
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Sebring, FL - USA
Joined: 7/16/2016
Posts: 18
Vette(s): 1987 Red Roadster Automatic (SOLD 4/4/23) it will be missed. 2004 Yellow Coupe 6 speed 2014 Red Convertible Z51 3LT
I would check for vacuum leaks first. my 87 had a broken vacuum line below the distributor. fixed that and then the heat/AC doors would work as they should, also the cruise control then worked fine.


Re: A/C blowing out of defrost and heater vents

Posted: 6/28/17 11:59am Message 4 of 4
Busterbrown
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Sonomma, CA - USA
Joined: 11/4/2013
Posts: 14
Vette(s): 1995 coupe DRM
If the 95 or 96 is the problem, remove the pass/side rail cover & check the valve.


in Forum: C4 Interior


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