1979 Chevy Corvette heater/AC control assembly

RCR1960

MEMBER
1979 CHEVROLET CORVETTE
V8
2WD
AUTOMATIC
25,000 MILES

I am restoring some interior parts on this car. While replacing the face plate and lens, a part that is washer like with star shaped edges that are curved fell off the bottom of the control assembly. When I run the ac, vent, and heater controls, I only am getting air from the lower part of the car. Nothing from any of the dash vents. I am sure this missing peice has something to do with the problem. Do you have a diagram that you could send me showing the location of the part? I am stumped!! Your help is greatly appreciated.

3 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

Hi
That is part of the vacumn master select switch. Pull out heater Ac controler find vacumn switch has a clear plug with svseral hyoses. Remove hoses that part holds vacumn pod together. @$8 dollar part. Replace and it will start working again.
Hope this helps
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Wednesday, July 22nd, 2009 AT 3:04 PM

RCR1960

MEMBER
2 POSTS

Found all the hoses you were talking about. Looks like that attatches to the control unit with 2 screws. That peice had already came off. I am still puzzled as to where this part goes. Could you send me a drawing or schematic on the breakdown of all this? I'm sure it would help me get it all back together. Thankk you!

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Thursday, July 23rd, 2009 AT 8:56 AM

DOCFIXIT

MECHANIC
18,828 POSTS

It can't be fixed replace @$8 if you put hose piece on the part that is on selector the star piece fits over the round boss. Which may have broken off usually how they die.

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Sunday, July 26th, 2009 AT 12:26 PM