Hvac Help????????????????
Thread Starter
Pro
Joined: Jun 2003
Posts: 618
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From: Kingston Springs Tn
Hvac Help????????????????
I just bought a 1993 LT1. Everything works great but the AC only blows out defrost and floor. I have replaced the HVAC control under the dash. Replaced the digital control in dash. Replaced the one way valve above passanger fuel rail. Replaced vacuums to cruise (which works great by the way). Is there something I am missing?? Is there something else under the dash to check. PLEASE Help.......Thanks!!!!!
Instructor
Joined: Oct 2007
Posts: 151
Likes: 1
HVAC problem
This is a common problem with the C4. It's most likely the vaccumm module. The module is located above the gas pedal. The holes in the rubber mating connector become soft and colapse under vaccumm. You will need to remove the vaccumm module and either replace or, bypass the connector. There is a great post on this in the fourm. do a search.
I'll see if i can find the post.
Iit's about a 4 hour job.
I'll see if i can find the post.
Iit's about a 4 hour job.
Instructor
Joined: Oct 2007
Posts: 151
Likes: 1
HVAC problem
Here's the thread.
most likely, This is the problem
http://forums.corvetteforum.com/show...c+co ntroller
most likely, This is the problem
http://forums.corvetteforum.com/show...c+co ntroller
Instructor
Joined: Oct 2007
Posts: 151
Likes: 1
