Question about 1997 Chevrolet Astro

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Unable to get air flow to move from defrost, 97 astro van

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Vacuum leak. Make sure the vacuum line into the firewall is not disconnected or broken

Posted on Nov 14, 2010

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Is there anything else that controls the fuel other then ecm on 1993 Astro van


oxygen sensors
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idle air control valve
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All these sensors send a signal to the ecm to regulate the air/fuel mixture.

Sep 07, 2011 | 1993 Chevrolet Astro

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Bleedin the air out of the cooling system in a 1999 chev. astro van.


an easy way to do that is take off the radator cap or over flow cap and start the moter turn your heater to high and put it on defrost once the bubbles stop coming out your done.

Nov 29, 2010 | Chevrolet Astro Cars & Trucks

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2004 astro van when turning on the ac the air comes out defrost.


Look for vac hoses damaged or dislodged. System is designed to fail in defrost mode.

Jul 26, 2010 | 2004 Chevrolet Astro

1 Answer

Blower air just through defroster vents, not front vents


The problem is that the plastic lines that the air flows through get frail and cracks and breaks.What happens is when the hose breaks you loose vacuum and the system reverts to defrost mode.You should be able to see it from under the hood on the passengers side.You will have to find the area that is broken and then go to the parts store and get some rubber hose that will fit over the plastic hose.Take a piece of the plastic hose with you so you can get the right size hose to fit over it.This just happened to my 97 Astro van.I found the broken hose and repaired it with the rubber line and is working normal now.Hope this helps.Let me know what you find out.Good luck.

Jul 20, 2010 | 1997 Chevrolet Astro

1 Answer

Looking for location of bcm on 97 astro van dash


The BCM is located immediately above the heater controls inside the dash on my 2004 Astro. I know it controls the headlights and locks but not gauges. Haynes says the gauge fuse supplies it power....but I'm not going to bank on that one.

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Good Luck

Nov 23, 2009 | 1997 Chevrolet Astro

1 Answer

2000 chevy astro cargo van. the heat registers on the gage but little comes out and only out defrost. thermostat????


If it is blowing hot air out of the defroster and not out of the heater vents then the door that directs the heat from the defroster isn't working properly it is blocking the heat from going to the heater vents. Also check the cold air door. It sounds like it isn't closing all the way to shut off the cold air and not letting the hot air pass.

Oct 06, 2009 | 2000 Chevrolet Astro

1 Answer

Don't get any air from vents on 1998 Chevrolet astro van. Just replaced clutch fan. Air cond. works fine and fan works fine. Is something not connected?


SOUNDS LIKE THE AC CONTROL HAS LOST VACUUM FROM THE ENGINE, YOU MAY HAVE KNOCKED A HOSE OFF WHILE CHANGING THE FAN CLUTCH, IS THE AIR COMING OUT THE DEFROST VENTS BY CHANCE?

Aug 06, 2009 | 1998 Chevrolet Astro

1 Answer

96 astro van what steps should i take to repair A C air flow It only blows on defrost Where is the directional control


Most likely the small vacuum hose under the hood broke just under the rudder air intake near the throttle cable bracket.

Jun 25, 2009 | 1996 Chevrolet Astro

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97 chevy astro can awd


drop down relay in trans

Jan 22, 2009 | 1997 Chevrolet Astro

1 Answer

Astro van 1997


The mode control switch is either defective or the switch has no vacuum, the motors that send the air to different outlets are powered by vacuum.

Oct 16, 2008 | 1997 Chevrolet Astro

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