Question about 2002 Chevrolet TrailBlazer

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I actualy have a 2003 trailblazer - the blower motor for the heat or air wont come on - when you push buttin for the fan speed - up or down it shows on the dash indicator - but it just does not work - BUT - then it does all of the sudden come on and the only way to turn it off is to pull the fuse under the hood long enough to kill the connection - it does not resond to the switch on dash thank you ! Jim

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That will be either the blower motor relay or blower motor resistor. One or both may be bad Good Luck!!!

Posted on Nov 14, 2010

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Why did my 02 trailblazer stop blowing ac through all the vents when, switched to heat it still doesn't blow air through the vents? I have no air flow what's wrong?? :(


First check all the fuses. There should be one for Blower or Heater. If all fuses are good, It is likely a bad blower motor or a switch to turn on the blower motor. Try all fan speeds in non auto mode and see if you get any activity. If you get activity on some fan speeds then it is the switch or sometimes called the blower motor resistor. If no activity, its time for a new blower motor. They are under the dash usually on the passenger side, shouldnt be too hard to pull out.

Aug 11, 2013 | 2006 Chevrolet Trailblazer

1 Answer

The air on my 2003 trailblazer only blows when on 4 or 5


Check out the link below, your blower motor resistor pack is probably defective.

Blower Resistor Replace link
http://www.sparkys-answers.com/2009/01/2002-gmc-envoy-no-low-blower-speeds.html

Jul 27, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Bad ac blower resistor


the resistor is only give you the speed of your blower motor ( inside fan )
it does not have any thing to do with cold or hot

Jul 19, 2010 | 2003 Chevrolet TrailBlazer

2 Answers

2003 trailblazer I have no heat or air coming out of my dash vents


Is it no heat/air when sitting still, or no heat air period? If the heat and air blow slightly when driving you have a bad blower mower/resisitor and its not allowing the air to blow into the cab. If not blowing period when moving probably bad heater controls or fuse... Worst case scanario is you have an electrical problem that needs to be diagnosed

Jul 15, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

2003 trailblazer back air stays on after the truck is turned off


hi, there is a technical service bulletin published by general motors about these trailblazers and this problem, it is very common to have this problem if you own one of these. the rear a/c module is located on the passenger side in the very back underneath the plastics and bezels in the back. there is a blower resistor module that controls the fan speeds and recieves input from the control panel that gets too hot and melts the plastic surrounding the wiring connector and allows the terminal inside the connector to short the fan control wire to battery power. if this is the case, you will have to replace the resistor module, the wiring and connector, and sometimes the blower motor. you should contact you local gm/chevy dealer for parts though, they have the wiring pigtail so you replace just the connector end, and the new style resistor module, and if i remeber right, i think there is a air shield in the kit to install to improve air flow inside across the resistor to help cool it down. the blower motor when running produces the cooling ability for the resistor, if there was no airflow across the resistor, it would overheat almost immeadiatly. take the rear plastics off and the rear seat out, and have a look, you should be able to find this problem pretty quickly.

Jun 23, 2010 | 2003 Chevrolet TrailBlazer

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

Ac or heat wont blow


Needs a blower motor resistor if the fan only blows on one speed. It is located underneath the firewall on the outside, near where the passenger exhaust system is. You need to take the passenger side cat converter off to get to it.

Jun 02, 2009 | 2003 Mercury Grand Marquis

1 Answer

Blower motor problems/ac problems


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

May 18, 2009 | 2006 Chevrolet Trailblazer

1 Answer

2001 BMW 330i..Fan for AC/vent not working?


it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.

Jan 16, 2009 | 2003 BMW 325

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