do you have the manual? Look up Astro ventilation...
Interior Fan Runs
Thread Starter
Instructor
Joined: Apr 2011
Posts: 137
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From: Goose Creek SC
Interior Fan Runs
I have an 81. When I turn on the ignition, I hear a fan running. The controls are in the OFF position. Must be connected to a heater hose of such because it gets a little warm. How to start to trouble shoot this?
Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
Melting Slicks
Joined: Jan 2003
Posts: 2,877
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From: Doha
St. Jude Donor '08
Its strange that I don't have that feature in my original A/C '71 'vette, but I do have it in the '70 Z28 Camaro. I don't know how much amps does it consume, but is there anyway to disable that feature?
Intermediate
Joined: Nov 2008
Posts: 26
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If you want it off (when it is on the low setting), just disconnect the harness at the resistor (mounted on top of the heater/ac box under the hood), bend over the tab that is connected to the dark brown wire and then reconnect the harness. Low will be off and the other settings will function normally.
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Le Mans Master
Joined: Jan 2006
Posts: 6,506
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From: Butler Pa
GM in their infinite wisdom decided that the air in the cabin could get "stale" on a long trip causing driver fatigue, so this was their solution. I believe all GM cars at one time had this feature.
At least that's what I've heard.
At least that's what I've heard.
Race Director
Joined: May 2006
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From: Dayton, Ohio
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Don't get me wrong,I'm not knocking guys for installing the manual shutoffs,only that its not needed on cars equipped with a factory one.
Le Mans Master
Joined: Jan 2006
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From: Butler Pa
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
No need to look. Astro-Ventilation went out in 76. It was GM's trade name for the fresh air ventilation system on the 68-75 cars.
Last edited by Easy Mike; May 19, 2011 at 02:33 PM.
Le Mans Master
Joined: Oct 2010
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From: melbourne florida
2023 C3 of the Year Finalist - Modified
may not be bad to have that fan run, we have a battery behind us in the passenger compartment. don't know if a battery puts out enough gas to matter but acid fumes can't be good to breathe.
