HVAC controls
Thread Starter
Advanced
Joined: Dec 2013
Posts: 73
Likes: 0
HVAC controls
I'm in the process of assembling my 74's interior and my heater/AC control looks like there should be 2 cables, one going to each wheel but there is only one cable. The left side wheel has the pin/lever that slides back and forth and there is one of the retainers screwed on the bend so I assume there used to be a cable. I've looked everywhere and can't find a diagram with this anywhere. The right wheel's cable goes to the heater blend door I assume. Can anyone help?
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Do you have the assembly instruction manual (AIM)? The AIM shows the installation of the HVAC controls and the cables. Don't quote me, but there may only be one cable on the temperature select side (cool to hot).
Racer
Joined: Jul 2013
Posts: 385
Likes: 3
From: Leesburg VA
The other side (left wheel) actuates a vacuum valve that diverts vacuum to different doors in the HVAC system depending on where the wheel is positioned. I believe there are something like 8 vacuum lines going to various points under the dash and one source vacuum line coming in from the engine compartment.
The AIM does show this, and has diagrams of which line goes where in the system. Very complicated...I hate vacuum systems...
John
The AIM does show this, and has diagrams of which line goes where in the system. Very complicated...I hate vacuum systems...
John
Safety Car
Joined: Feb 2006
Posts: 4,789
Likes: 7
Just went through this on my 73. Only one cable which goes to the air flow divert door. The small rubber vacuum manifold pushes on the other side and is held in place by one screw. I used the diagrams Wilcox provides on their website...http://willcoxcorvette.com/instructi..._schematic.JPG
and...
http://willcoxcorvette.com/instructi...ND_AC_1974.pdf
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
