Question about 2004 Chevrolet TrailBlazer

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Chevy trailblazer heat/AC fan speeds slowly stopped working

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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countrysi248
  • 443 Answers

SOURCE: HOW DO I FIX THE AC/HEATER BLOWER FAN ON MY 2004

Your switch acts as a reastat which adjusts your speeds your switch is going bad so you only have the two speeds left on that reastat.. thanks Jerry

Posted on Apr 22, 2009

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  • 20 Answers

SOURCE: i have 2005 chevy trailblazer heater wont work,

Sounds like your water pump is going out or your thermostat is stuck. Check the thermostat first and make sure it is not frozen in the clsed position.

Posted on May 08, 2009

  • 288 Answers

SOURCE: Chevy TrailBlazer heat won't shut off

most gm cars use electrily controled temp actuator door on top of center of heater case . if move the temp lever to hot or cold you should see the door arm move sometimes the arm will move but the door dosent there is three wires too the motor one 12 volt one ground and one return to the hvac modle head controls there are different colors for the return wire.basically you can un hook the arm and move it manunlly to see if it makes a difference at the vent while the ac system is on.the way test for the problem is to check the voltage on the return wire at the motor and ground with a dvm meter you should see a vary voltage when slide temp controls from hot to cold . more than likey it is hvac control head but check first they are costly.

Posted on Jun 21, 2009

  • 1608 Answers

SOURCE: 1998 Chevy Cavalier z24 heating/AC fan only runs

Replace the blower motor resistor. It is next to the blower motor.Should be on the passengers side under the dash panel.Good luck.

Posted on Nov 18, 2009

  • 104 Answers

SOURCE: Bad Clutch Fan? Rear ac/heat don't work front only works on 4

The fan clutch isnt engaged at all times, therefore it may be normal to hold it in place (not recommended). On these trailblazer's 4.2L engine the fan clutch is electronically controlled. Usually when this vehicle's fan clutch malfunctions, there is a random ticking noise while idling or at a stop, also the "service engine soon" may turn on. As for the the fan speed problem, this may be a faulty blower resistor malf (typical) or climate control unit may be faulty. Hopefully this helps!!

Posted on May 05, 2010

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2 Answers

Heating/ac fan isn`t working on my 2006 trailblazer


Did you check in the fuse box in thje engine compartment?

Dec 06, 2012 | 2006 Chevrolet Trailblazer

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2005 chevy trailblazer ac won't work but defrost does while driving only


Hi. There happens to be a common problem with these trailblazers inside the ducting box located under the dashboard. The mode actuator door motor stops working due to a faulty motor itself and the default position is defrost only. As far as the Air Conditioning not working, there maybe another problem to diagnose there. Could be low refrigerant, or electrical problems to the compressor, or faulty fan clutch(another very common problem with these trucks). Type in mode actuator door and 2005 trailblazer in your search engine online i.e. Google or Yahoo and you will find many posts about this problem. I think there may even be a Youtube video about replacing it. Let me know you need more help. Thanks.

Aug 08, 2012 | 2003 Chevrolet Blazer

1 Answer

Bad Clutch Fan? Rear ac/heat don't work front only works on 4


The fan clutch isnt engaged at all times, therefore it may be normal to hold it in place (not recommended). On these trailblazer's 4.2L engine the fan clutch is electronically controlled. Usually when this vehicle's fan clutch malfunctions, there is a random ticking noise while idling or at a stop, also the "service engine soon" may turn on. As for the the fan speed problem, this may be a faulty blower resistor malf (typical) or climate control unit may be faulty. Hopefully this helps!!

May 05, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Speedometer and Heat blower not working


The fan motor has gone out,it was bad before it went out,drawing too many amps,so it took the blower motor resister out with it.The resister is next to the blower motor.On the speedo,check,or replace the speed sensor in the transmission,

Nov 20, 2009 | 2000 Ford Focus

1 Answer

Blower motor problems/ac problems


List of possibilities :
blower motor
resistors
switch(On/OFF)

May 18, 2009 | 2006 Chevrolet Trailblazer

2 Answers

2003 Chevy Trailblazer - Rear Heat/AC Controls Don't Work


Sorry, I don't have an answer, but have the same problem. Did you ever figure out what was wrong?

Apr 16, 2009 | 2003 Chevrolet Tahoe

1 Answer

I have 2005 chevy trailblazer heater wont work,


Sounds like your water pump is going out or your thermostat is stuck. Check the thermostat first and make sure it is not frozen in the clsed position.

Mar 10, 2009 | 2005 Chevrolet Trailblazer Ext

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