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04-29-2012, 08:09 PM
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#1 |
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Registered User
Join Date: Jan 2012
Location: New City, NY
Posts: 32
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Defroster
Hi Im having some trouble getting my defrost to work. My truck is an 82 with ac. No matter what position my climate control switch is in my vents all blow air the same. If i switch to defrost it blows the same air just with the ac compressor engaging as well, but the vents dont blow air any differently.
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04-29-2012, 08:41 PM
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#2 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,281
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Re: Defroster
theres a vacuum leak or disconnect under the dash prolly
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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04-29-2012, 11:59 PM
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#3 |
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Registered User
Join Date: Jan 2012
Location: New City, NY
Posts: 32
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Re: Defroster
its controlled by vacuum on an 82? where do the lines run to?
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04-30-2012, 12:38 AM
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#4 |
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Registered User
Join Date: Jan 2009
Location: Canada
Posts: 308
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Re: Defroster
Look for a vacuum line under the hood that comes out of the fire wall by the a/c/heater box I think its purple and make sure its hooked up to a vacuum source.
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04-30-2012, 08:53 AM
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#5 |
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Registered User
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
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Re: Defroster
Hopefully it's a simple vac line missing and not a blend door actuator issue. Easiest things are the vac line, and also, there's a vac switch behind the climate control switch. Easy to replace and fairly cheap.
If it's your blend door actuator, check out this thread... http://67-72chevytrucks.com/vboard/s...d.php?t=460942
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1st - '68 long bed 2nd - '81 SWB Now - '86 SWB, Edelbrock 1406/stock 350/700r4 |
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04-30-2012, 11:54 AM
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#6 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Defroster
not sure if it's the same
the def/floor valve inside the "air box" can be ajusted (rod into one of three holes) in some to be always a little up, or down, or all up, or down
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 04-30-2012 at 11:59 AM. |
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04-30-2012, 03:33 PM
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#7 |
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Registered User
Join Date: Jan 2012
Location: New City, NY
Posts: 32
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Re: Defroster
Alright ill have to take a look, lots of good pics thank you.
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