Last post on Aug 12, 2012 at 5:16 PM
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Chevrolet TrailBlazer, Chevrolet TrailBlazer EXT, Heating / Cooling, SUV
#13 of 52 AC not getting cold fast enough
May 13, 2009 (9:30 am)
Anyone know why my 2002 TrailBlazer AC is not getting cold fast enough? I live in FL, so it's crutial that I get this fix as we are already into the high 90's. Our Lexus takes just seconds to cool the car & it's the same year as the TB. The TB takes several minutes. I took it in this past fall to see if it needed freon, but it was full. huh, Help!
#14 of 52 Re: blower motor [blazer6973547]
May 13, 2009 (6:18 pm)
The rear seat floor vents, behind the front seats, are driven from the front passenger controller. The overhead vents, and the rear row vent on the passenger side are driven by the rear controller. To get air conditioning out of the floor vents I believe we must select both foot and shoulder levels.
The rear controller has two servos, one that selects either heating or air, and one that controls whether the side or top vents are selected. The servos are located with a blower motor behind the passenger rear tire. The controller is under the 2nd row passenger seat along with the fuses.
Hope this helps.
#15 of 52 Re: AC not getting cold fast enough [tirtlelove]
May 13, 2009 (6:23 pm)
If you have the rear AC unit too, then the AC is going to both the front condensor and the rear condensor and will take a while to have an effect. I have the rear AC in the extended (EXT) version though it no longer works.
I would make certain that you turn on the rear AC to full cooling through the roof vents in addition to the front. Otherwise by just using the front you're cooling down the rear condensor but not running air through it.
#16 of 52 Re: AC not getting cold fast enough [tirtlelove]
May 14, 2009 (6:03 am)
If you go back and look at the main Trailblazer thread you'll see posts about this from early on. If the condensor is hot from sitting in the sun, or from a hot engine after you have shut it off and retarted it while it's still hot, the A/C compressor won't come on until some air has passed over the condensor to cool it down. Add to this the fact that Trailblazers have a viscous controlled cooling fan that runs very slow until the cooling system needs more air pulled over the radiator.
When we go to our home in Arizona with our 02 Trailblazer we notice this quite often in the summer. If it's retarted while still warm, or if it's been sitting in the sun during the hottest part of the day, it won't come on right away, it usually takes 30 seconds to a minute or so of sustained driving (stop and go makes it longer) until the compressor comes on. If it's been in the garage, even if the air temperature is 110+, it will turn on right away as long as the condensor is not heated up from a hot engine.
There's no way to change it I'm aware of. Really though, "Our Lexus takes just seconds to cool the car". On a hot day it takes a little longer than that, right?
#17 of 52 Front blower won't work back running just find
Aug 01, 2009 (7:56 pm)
My AC blower went out in the front the back is running just fine no fuses out need help
Aug 03, 2009 (8:08 am)
there is a relay attached to the blower motor located behind the glove box
#19 of 52 Blower activates after key is removed
Aug 29, 2009 (6:36 pm)
I have a 06 TB, 6 cyl., 4WD. After the engine is turned off and key removed and approximately 10 minutes later the front blower will come on and run for about 10 minutes, then turns off. As far as I can tell will not come on again until the key is turned on to run position then to off. This is repeatable.
I took it to the dealer and they replaced the "body control module" and within two days ( only because I assumed it was fixed) I noticed the blower coming on, same as before.
Any ideas? Thanks
#20 of 52 air conditioning quit then started working again?
Sep 09, 2009 (8:47 am)
Air Condition not cooling. temp adjustments up or down didn't change temp of air from fan. Checked fuse and relay. This morning the unit started working again? Is there a circuit breaker or auto-reset or is this just one of those "beats me!" situations?
#21 of 52 Re: blower motor [blazer6973547]
Nov 04, 2009 (12:28 pm)
i have the same problem only number 4 works
how did you fix yours
#22 of 52 HVAC Mode selection does not change
Jan 09, 2010 (12:41 pm)
My 2004 Trailblazer EXT V6 HVAC mode selection does not change. Currently the blower is only blowing out the floor vents. When I depress the MODE button the display cycles thru the various options. However, the blower only comes out at the floor. When the front defrost is depressed the unit does blow from both the defrost and floor. I checked the fuses and relays. Any ideas?