AC, Heat all settings blow against windshield, not through vents
#1
Junior Member
Thread Starter
iTrader: (3)
Join Date: Jul 2007
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
AC, Heat all settings blow against windshield, not through vents
Hi and thanks in advance for reading this post.
I've been driving my '87 GTA almost daily since I returned it to the road a few months ago. 305 TPI/Auto, digital dash. I've charged the AC with R12, and replaced the blower motor.
It doesn't matter whether I select Max AC, Norm AC, Bi-level, or Heater...most of the air blows up against the windshield and not through the vents.
Any ideas for repair?
Thanks in advance,
Steve
halfmoontrail@yahoo.com
I've been driving my '87 GTA almost daily since I returned it to the road a few months ago. 305 TPI/Auto, digital dash. I've charged the AC with R12, and replaced the blower motor.
It doesn't matter whether I select Max AC, Norm AC, Bi-level, or Heater...most of the air blows up against the windshield and not through the vents.
Any ideas for repair?
Thanks in advance,
Steve
halfmoontrail@yahoo.com
#2
Junior Member
Join Date: Jul 2009
Location: EFFIE LOUISANNA
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 CAMARO RS
Engine: 355
Transmission: WORLD CLASS T5
Axle/Gears: 308
Re: AC, Heat all settings blow against windshield, not through vents
THE VENT DOORS ARE CONTROLED BY VACCUM,LOOK FOR A LEAK UNDER THE DASH OR BEHIND THE CONTROL PANEL .
#3
Junior Member
Thread Starter
iTrader: (3)
Join Date: Jul 2007
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
Re: AC, Heat all settings blow against windshield, not through vents
Thanks for your reply. Is the vacuum from the engine? Do I need to look under the hood, or from the pass. side, or the drivers side?
I appreciate the help.
Steve
I appreciate the help.
Steve
#4
Member
Join Date: Apr 2009
Location: Central NJ
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
Car: '92 Camaro
Engine: 350 TPI
Re: AC, Heat all settings blow against windshield, not through vents
I'm interested in how you fix this because I have the same issue with my camaro
#5
Supreme Member
Join Date: Sep 2002
Location: Cary, North Carolina
Posts: 9,192
Likes: 0
Received 16 Likes
on
16 Posts
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: AC, Heat all settings blow against windshield, not through vents
The vacuum line from the engine enters the firewall on pass side, just about where last spark plug is, close to edge of heater box - it is bundled there with the wires that control the fan on the heater box.
On the inside, remove the radio bezel, and then remove the heater controls - you'll see where the vacuum line runs into the heater controls, and where the heater controls 'sends' this vacuum through a round switch looking thing on the right hand side that has several vacuum lines in different colors coming out of it.
These are the places to look for the leaks.
On the inside, remove the radio bezel, and then remove the heater controls - you'll see where the vacuum line runs into the heater controls, and where the heater controls 'sends' this vacuum through a round switch looking thing on the right hand side that has several vacuum lines in different colors coming out of it.
These are the places to look for the leaks.
#6
Supreme Member
Re: AC, Heat all settings blow against windshield, not through vents
I've had problems with mine doing this, but it wasn't for lack of vacuum. From sitting for long periods of time, the damper doors get stuck. I was able to free mine by playing with the controls until it broke free. I now leave the controls in the vent position with the fan off so that the door has to operate every time I start the car.
#7
Re: AC, Heat all settings blow against windshield, not through vents
If you can hear a hissing sound when you move your selector switch you need to replace the round thingy as mentioned above it is called a selector valve part#16032395 your control is going to default mode. The valve controls what vent air comes out of.
Trending Topics
#8
Moderator
iTrader: (5)
Re: AC, Heat all settings blow against windshield, not through vents
Here's what the selector looks like:
https://www.thirdgen.org/forums/atta...duct010707.jpg
A leak at the valve (or anywhere else )causes the default setting: defrost.
JamesC
https://www.thirdgen.org/forums/atta...duct010707.jpg
A leak at the valve (or anywhere else )causes the default setting: defrost.
JamesC
#9
Re: AC, Heat all settings blow against windshield, not through vents
I'm new to this site and need help locating this 16032395 vacuum selector valve for my '91 z28. I've tried to locate it variuos ways with no luck. Does anyone know where to purchase one?
#10
Re: AC, Heat all settings blow against windshield, not through vents
Autozone or any parts store should have it or try gm parts direct or napa. Just make sure u connect the right hose back to the right connection on th new one.
#12
Moderator
iTrader: (2)
Re: AC, Heat all settings blow against windshield, not through vents
http://www.top-downsolutions.com/ind...category_id=67
I've begun refurbishing these GM 16032395, A/C HEATER VACUUM CONTROL VALVE.
Lon Salgren
I've begun refurbishing these GM 16032395, A/C HEATER VACUUM CONTROL VALVE.
Lon Salgren
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
05-10-2023 07:19 PM
colton_carlson
Firebirds for Sale
7
03-08-2019 12:21 PM