Question about 1996 Chevrolet Blazer

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Why would no air blow out of the dash vents but blow out of the defrost vents. The air conditioning when turned on does the same thing.

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There's (flap or doors) that open and close depending where you are the air to come from. The door opening for the vents is most likely broke and staying closed or it is not getting vacuum to the door to open it. They charge $250+ to get into the air unit find problem and fix it. It it a very aggravating job for a person new to this. Take a swing by a air cond specialist to see if they can give you a better answer with the price and problem.

Posted on Aug 28, 2010

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Related Questions:

1 Answer

Blowes air throught defrost vents only


its a problem with the switching mechanism. you have to look up under the dash to see if you can see where the switching mechanism is. if you can not see it from there youll have to remove complete center dash

Apr 04, 2010 | 2004 Jeep Grand Cherokee

1 Answer

I have an 01 Jeep Grand Cherokee. When you turn on the air conditioning air does not blow out any of the vents except a small amount of air (cold) will blow out the defroster vents by the windshield. If...


behind the center counsel between the floor and the heater housing is a part that is called the blend door actuator. these usually go bad and have to be replaced.

Mar 15, 2010 | 2001 Jeep Grand Cherokee

1 Answer

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.

Oct 06, 2009 | 2005 Chevrolet Silverado

1 Answer

When I turn my vent selector to defrost on the far right (air con off)the air conditioning comes on. The dash vents will blow ambient air, but defrost setting blows air con. Any ideas?


It's normal for the A/C compressor to come on with the defroster to dehumidify the air so the windsheild won't fog up under humid conditions. You can still control the air temp. out the vents with the temp. select switch.

Jul 19, 2009 | 2005 Jeep Wrangler

1 Answer

Air condition vents on dash are not blowing any air, only the defrost vents on top of dash are blowing, any ideas


It sounds like the flap that controls air flow is stuck. It is controlled by vacuum. The vacuum line could be leaking, the line could be off, or the vacuum actuator could be faulty. Hope this helped.

Jul 17, 2009 | 2001 Jeep Cherokee

2 Answers

Air conditioning blows through defrost vents only


AC blows where you have your control switch set,if it only comes out your defroster have the vacuum check at the blend air doors or if you have a faulty heater control unit.

Jul 13, 2009 | 2004 Ford F150

1 Answer

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.

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1 Answer

Air conditioning and heating


have the water pump checked out, i had a van that did the same thing and founf i had a bad water pump it fixed the problem.also check the blower motor to make sure its working right by tapping on it while you have the car running. the car will survive dont worry its going to be one of those two things im pretty sure.

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Heat wont blow through heater or defroster vents


Had the same problem. believe it or not i changed the gas cap and got heat all around. something about pressure.

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1 Answer

Climate Control Air Conditioning


check for vac leaks under hood and dashbord

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