Climate Control Vacuum leak fix?
Thread Starter
Racer
Joined: Nov 2006
Posts: 296
Likes: 0
From: NYC....In the Place to be!
Climate Control Vacuum leak fix?
Hey Gents,
I have a 96LT4 CE
I searched around the forums for the right answer...I may not be using the right word for the search but I hope you guys can help I grabbed the following from one of my seraches and it best describes what I am experiencing....I read that there was an easy fix for it but no one went into detail on how to fix...:
"The climate control?? I turned it on and it blew cold and hot, but seemed to be stuck on defrost and blowing air where your feet are. When changing to the vents, nothing happed. Fan started to go faster, but did not change from defrost to vents. .......this happens and as soon as the car is driven a little, it changes over. "
Can someone please explain how to fix? thank you
I have a 96LT4 CE
I searched around the forums for the right answer...I may not be using the right word for the search but I hope you guys can help I grabbed the following from one of my seraches and it best describes what I am experiencing....I read that there was an easy fix for it but no one went into detail on how to fix...:
"The climate control?? I turned it on and it blew cold and hot, but seemed to be stuck on defrost and blowing air where your feet are. When changing to the vents, nothing happed. Fan started to go faster, but did not change from defrost to vents. .......this happens and as soon as the car is driven a little, it changes over. "
Can someone please explain how to fix? thank you
Le Mans Master
Joined: Dec 2003
Posts: 5,867
Likes: 17
From: Phoenix Arizona
This is a very common problem on the 96s.
I wrote about my fix here:
http://forums.corvetteforum.com/show...=ac+controller
Scroll down for the post and photos.
Hope this helps!
I wrote about my fix here:
http://forums.corvetteforum.com/show...=ac+controller
Scroll down for the post and photos.
Hope this helps!
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Also take a look at the vacuum check valve on the right side of the engine under the plastic cover. Its has 3 hoses to it and provides vacuum for the A/C vents and the cruse control. See if it is cracked or falling apart. The part is under $10 from GM if it is bad. 
Thread Starter
Racer
Joined: Nov 2006
Posts: 296
Likes: 0
From: NYC....In the Place to be!
This is a very common problem on the 96s.
I wrote about my fix here:
http://forums.corvetteforum.com/show...=ac+controller
Scroll down for the post and photos.
Hope this helps!
I wrote about my fix here:
http://forums.corvetteforum.com/show...=ac+controller
Scroll down for the post and photos.
Hope this helps!
Safety Car
Joined: Feb 1999
Posts: 3,504
Likes: 4
From: Mexico Beach FL
Common problem on LT1/LT4.
Easy to confirm and easy to fix.
Tom Piper
Le Mans Master
Joined: Apr 2000
Posts: 5,589
Likes: 0
From: DrunkDefender
CI 1-2-3-4-5-6-7-8 Veteran
CI-IV AutoX Champ
CI-IV Burnout Champ
St. Jude Donor '07-'10
Digital disaster has the problem nailed. The problem is that the controller gets its vac source from the intake and over time the gases and vapors make their way to the manifold on the controller and degrade the plastic on the nipple. My solution odd as it sounds was to use a small drill bit and clean it out but mine wasnt that soft yet. I've also used a small brass connector like the ones used in commercial HVAC contol lines and its the same diameter as the nipple and same length too. I cut the nipple off and using a 1/4 inch drill bit was able to carefully hoolow out a depression where the old nipple had been and allowed the brass nipple to sit snugly in the depression. I used household everyday superglue to secure the brass nipple. 2 years later it works like a champ and switchs the vents instantly. If I could host the pics I have em of the brass nipple I used.
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Brett Foote
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
the 96 problem is definately those rubber nipples.
I just installed the hard plastic nipples, and ALL FIXED !!!!
and I tried everything before to get good vacumme, nothing worked.
and GM wants $1125 for a 96 controller box !
I have an extra box on sale in the parts section.
(with the correct nipples)
I just installed the hard plastic nipples, and ALL FIXED !!!!
and I tried everything before to get good vacumme, nothing worked.
and GM wants $1125 for a 96 controller box !
I have an extra box on sale in the parts section.
(with the correct nipples)
Le Mans Master
Joined: Sep 2002
Posts: 8,991
Likes: 2
From: Hanger 18 Taxachusetts
