Home page

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

in Forum: C4 Interior

A/C blowing out of defrost and heater vents (1/4)
 6/22/17 7:47pm
vettish95
Standard Member
Send Private Message

Santee, CA - USA

Vette(s):
1996 Coupe. I have owned a 1979, a 1987 convertible, and a 1995 coupe


Joined: 5/14/2017
Posts: 1

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
Our Sponsors help support C4VR
Re: A/C blowing out of defrost and heater vents (2/4)
 6/23/17 4:21pm
Atchafalaya
Standard Member
Moderator
Send Private Message

Atchafalaya Basin, LA - USA

Vette(s):
Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe


Joined: 3/20/2009
Posts: 560

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 (3/4)
 6/25/17 12:00pm
russ1953
Standard Member
Send Private Message

Sebring, FL - USA

Vette(s):
1987 Red Roadster 2004 Yellow Coupe


Joined: 7/16/2016
Posts: 16

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 (4/4)
 6/28/17 2:59pm
Busterbrown
Standard Member
Send Private Message

Sonomma, CA - USA

Vette(s):
1995 coupe DRM


Joined: 11/4/2013
Posts: 14

If the 95 or 96 is the problem, remove the pass/side rail cover & check the valve.
Our Sponsors help support C4VR