Question about 2004 Chevrolet TrailBlazer

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Replaced battery in 2004 chevy trailblazer 4x4 8cl., then air conditioner doesnt blow out the face vents only the defrost and feet. any ideas?

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  • Chevrolet Master
  • 4,341 Answers

Typically, you have a vacuum issue, air flow system is designed to FAIL in the defrost mode, so no vacuum, doors are spring loaded to blow out defrost ports.

Posted on Sep 25, 2009

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Posted on Jan 02, 2017

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  • 129 Answers

SOURCE: The Air flows through only the defrost and feet vents

Inside the ventilation system there is gates that open and close to direct the air flow. These are operated on vacuum on most vehicles. The hose for that perticular gate may have disconnected somehow or has a hole in it. I suggest you take the heater controls out and see if there is a plug with a series of colored hoses on it. it so you'll have to trace each of them to see which one is the problem. Now you may be able to get some help from you local dealers mechanic who just may know the color code for that gate. (which would be a bonus) Good Luck

Posted on May 28, 2009

alicantecoli
  • 22265 Answers

SOURCE: a/c and heater only blow air out of defrost

either a vacumn pipe is broken or the ends split so its not passing a vacumn to open the flaps,where they are and how to get to them i cant help because i have never worked on one as they are not here in spain.check the engine end first though .Look for some small rubber pipes running from the inlet manifold

Posted on May 30, 2009

cadman000
  • 607 Answers

SOURCE: a/c and heater only blow air out of defrost

sounds like there is a vacuum leak, possibly under the hood.. Vaccumm is needed to change the mode doors.

Posted on Mar 30, 2009

  • 52 Answers

SOURCE: 2004 Chevy Silverdo Crew Cab

if your ac is on max i believe it recirculates the air in the car by sucking air in by the defrost vents and blows it back out of the normal vents try to move the controls to make sure the that the shutters are working and make sure the ac is not on max by selecting the knob that has an arrow going through the little car instead of the circular one that might fix the problem

Posted on Jun 29, 2009

maholmes
  • 38 Answers

SOURCE: I have a 2004 chevy trailblazer. My problem is the

There maybe some thing wrong with the air direction door. Or the actuator that operates it. This is probably a dealer fix but check local auto A/C repair shops to see if they can do this kind of work.

Posted on Aug 12, 2009

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1 Answer

Trailblazer vents wont change from defrost ,to your feet,to your face etc. 2004 just had air compressor replaced if that matters.


System uses vacuum to operate the doors. Defaults to defrost when vacuum fails. Vacuum line from engine intake manifold is probably off or perhaps leaking--may have been disturbed during the other repair work. look for small loose vacuum line in engine compartment.

Aug 27, 2010 | 2006 Chevrolet Trailblazer

2 Answers

AIR CONDITIONER WILL ONLY BLOW THROUGH THE DEFROST AND FEET VENT. WILL NOT BLOW THROUGH THE FRONT VENTS.


you vacumn pipes are perished ,work from the inlet masnifold backwards and iam sure you find a split or perished pipe

Jul 24, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

My vents on my 2004 Chevy Trailblazer won't blow heat or air


vent actuator control has lost vacume source. check for disconnected vacume lines at actuators at blend doors.also check vacume lines in engine compartment. these small vacume lines brake easily also can be deteriated near battery due to battery acid contamination

Mar 21, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 2004 chevy trailblazer. My problem is the a/c not blowing out the front vents, but is blowing out the floor, side, and defrost vents. What is the problem?


There maybe some thing wrong with the air direction door. Or the actuator that operates it. This is probably a dealer fix but check local auto A/C repair shops to see if they can do this kind of work.

Aug 09, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Trailblazer ac fan only blows at feet or defrost, not console


the actuator motor is the problem most likeley/// at least 3 in system it will be half way up in side dash pull all under sheilding and use flash light and hand to feel for it ,u can watch them move to eliminate the one tha t is not working

Jun 30, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

2004 Chevy Silverdo Crew Cab


if your ac is on max i believe it recirculates the air in the car by sucking air in by the defrost vents and blows it back out of the normal vents try to move the controls to make sure the that the shutters are working and make sure the ac is not on max by selecting the knob that has an arrow going through the little car instead of the circular one that might fix the problem

Jun 29, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Air Conditioner blows hot on one side after battery DC


You need to replace the driver side temperature door control actuator. While doing this... make sure you bolt the new one in AND THEN PLUG IT IN or it will spin and not line up in the right place... then there is a series of crazy steps to fix that problem.

Jun 26, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

LINCOLN LS AC DOOR PROBLEM


you have an operating trampilla ,sorry i only know the word in spanish,the valve thats worked by engine vacumn it opens the vent flap ,the block connection for the vacumn pipe has a series of electrical operating relays that open the valve that lets the vacumn through to the appropiate vents where it opens the trampilla .The fault could lie in either the clima computer or a relay valve or the rubber diaphragm in the trampilla,best of british with it

May 20, 2009 | 2004 Lincoln LS

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