Question about 2000 Chevrolet Astro

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A/C Vents

Blower only blows out the defrost and floor !

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  • Anonymous Apr 02, 2009

    low air pressure and only works on defrost.i need vacuum hose diagram for a/c.

  • Anonymous Apr 15, 2009

    2000 Chevy Astro Van rear A/C not working?

  • Anonymous May 01, 2009

    Cold air comes out defrosters only heater is the same way.

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Check for a vacuum leak. There is a vacuum hose that goes from the firewall to a tee near the AC evaporator. It runs behind the alternator and has a nasty habit of drying and breaking.

Posted on Aug 07, 2008

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Bad fuse.

Posted on Jun 25, 2008

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  • 124 Answers

SOURCE: heater control 98 chevy s10 blazer

These trucks have a problem where moisture builds up in the heater box then freezes. When this freezes and you change your heater settings it breaks the shaft for the blend door. If this is what happened you should be able to look under the dash above and to the right of the gas pedal and you will see two vaccuum accuators one of them you should be able to wiggle around the linkage if it is broke. To fix this you need to remove the entire dash to get the heater box out which involves discharging the AC and draining the coolant because the heater core and evaporator come out. Please rate.

Posted on Dec 13, 2008

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SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

  • 37 Answers

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

  • 432 Answers

SOURCE: All Air Conditioning blows our the defrost vents

Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
With a cold engine,look for a skinny vacuum hose that runs from the intake toward the fire wall . It should be going inside the cab and connecting to the A/C vent control.Some times the hose becomes disconnected or splits or cracks due to heat under the hood.
Thats usually the trouble.
I hope this helps you.

Posted on Oct 06, 2009

  • 31 Answers

SOURCE: Heater blows out dash vents only. Will not blow

Sounds like the switch that closes and opens the door for the changing of air flow is bad.

Posted on Feb 17, 2010

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Posted on Jan 02, 2017

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1 Answer

I have a 1997 Volvo 960, the A/C & heat both work, but when I cut on the blower I can hear it blowing, but not out the vents.


If it's blowing it has to be coming out someplace. If not the vents it has to be the floor or defrost. Let me know. Don't know about Volvo but older chevy's if they loose vacuum they will only blow out the defrost vents.

Apr 02, 2017 | Volvo Cars & Trucks

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Air does not blow through vent on 1994 chevy silverado


Which vents, floor--defrost--dash? Can you hear the blower motor running? The squirrel cage could have broken loose from blower motor? There could be an actuator problem under the dash? If actuators are vacuum controlled and vacuum is lost, it might default to defrost, only blow out defrost vents.

Nov 06, 2016 | Chevrolet Silverado Cars & Trucks

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AC is only blowing through the defrost vents in the dashboard?


I think your problem is the head unit that selects where the air comes out ie. Face, floor, defrost, or hi-level face and floor. If that's not working then it will not let you switch location that you want the air to come out.

Jul 26, 2012 | 2003 Chevrolet Tahoe

1 Answer

Heater blower will not blow out to floor


In relation to this problem,there is help link provided below.Click the link below to go through its procedure to troubleshoot the problem :----------
http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html

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This will help.
Thanks.

Feb 11, 2012 | 2004 Chevrolet S-10

1 Answer

Airflow problem through ac vents


Your selector panel is bad, ( temp, blower, ect.) all one unit, my 95 did same thing chg. that unit and it fix it.

Aug 19, 2009 | 1998 Chevrolet C/K 3500

1 Answer

A/C Vents


cable lock mechanism on air diverter plate is broken.probably at control panel rear arm point. haynes manuel at auto parts store shows repair procedures.

May 09, 2009 | 2001 Chevrolet Astro

1 Answer

Defrost and floor wont blow air but vents work


these repairs are usually best left to an electromechanic but it can be doen by anyone with basic knowledge following the troubleshooting section in repair manual which can be purchase from local parts shop or online haynes or chiltons will do and get a multitester.

First check basics: are the fuses good to defrost blower? (fuse access refer to manual)
then see if there is power to the blower/defrost switch use multi meter at 20V setting
then see if there is power to blower unit under dash (see manual under interior section to access blower motor)
probe using same setting to test for power on each wire ( as you turn blower setting from low to high you shuld notice the voltagre climbs aswell)
if this checks out your blower motor is faulty replace and your good heres a few places to get the best deal on parts
ebay.com
Peach street autorecylcing 18003652341
www.godspeedmotorsportsonline.com

Jan 19, 2009 | 2003 Ford Windstar

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