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Topic: Heat/Defrost control

in Forum: C3 Cooling and Heating Systems


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Heat/Defrost control (1/4)
 1/10/07 9:13pm
Karmel77Lifetime Member
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Clarksville, TN - USA

Vette(s):
1977 L48 T Top, Dark Blue

Joined: 10/22/2005
Posts: 265

When I slide the heat control from heat to defrost I'm getting no air out of the defrost, all still comming out the floor ports.  I don't even hear any audiable change.  All the ductwork is connected , no blockage.   Is this totaly vacuum opperated? Or mechanical?  What should I check first?
 
ThanksSmile


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Mel
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Heat/Defrost control (2/4)
 1/10/07 10:55pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

Mel, I'm not sure on your car, but I think the "Mode" door is vac. operated. It could be a cable, tho. ('77 was when they changed the A/C-Heat controls/console.)

Hopefully some one will have that answer.

Don't you have the factory service manual?

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Heat/Defrost control (3/4)
 1/10/07 11:13pm
Karmel77Lifetime Member
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Clarksville, TN - USA

Vette(s):
1977 L48 T Top, Dark Blue

Joined: 10/22/2005
Posts: 265

Joel,
No factory service manualConfused, have a Haynes service manual but it leaves out a lot of details.Unhappy  
 
 
Thanks,


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Mel
Lifetime Member #90

 

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Heat/Defrost control (4/4)
 1/10/07 11:45pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

Mel, HERE's a h e l l of a deal on the factory manual! Check it out while waiting on someone here to respond!

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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