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12-11-2003, 10:59 AM
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#1 |
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Registered User
Join Date: Dec 2003
Location: Arkansas
Posts: 4
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Heater Questions
I have an 86 chevy 4x4 and I have a problem with the Defrost and Vents working properly. When you have the Defrost on it blows out the vents and everything else but if you put it on the vents it doesn't blow out the defrost. Anyone have any idea whats the problem.
  
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12-11-2003, 11:07 AM
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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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welcome to the board
is this an air conditioned truck?
__________________
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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12-11-2003, 11:10 AM
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#3 |
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Registered User
Join Date: Dec 2003
Location: Arkansas
Posts: 4
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Yes, it is an A/C truck.
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12-12-2003, 11:03 AM
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#4 |
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Registered User
Join Date: Jul 2001
Location: Laughlin, Nv. USA
Posts: 700
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could be the control assembly that switches vacum to seperate ports or could be a accuator valve, or could be a stuck or bad seal on the vent door switching betwen the defrost or vent system, these things can be tricky, I have been fighting with mine which is doing the opposite of yours (mine is a 88 blazer).
here is your parts though that could be the problem. |
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12-12-2003, 11:45 AM
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#5 |
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Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
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Take the glove box off. Behind the glove box you will see a cable that goes to the Diverter Flap. Reach over that cable till you hit the fire wall. Your hand should be directly over the Vacuum motor that controls that flap that send it dash or defroster. If that heataer core has been replaced I bet they frogot to hook the line to it. Sould be able to feel the nipple thathe line goes on. Line should loop over the box in that area.
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Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
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12-12-2003, 12:36 PM
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#6 |
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Registered User
Join Date: Dec 2003
Location: Arkansas
Posts: 4
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All right thanks for the info. I've been checking everything. I'll check that vacuum motor!!
Last edited by 86chevyman; 12-12-2003 at 12:39 PM. |
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