2002 Chevy Trailblazer LTZ is blowing HOT air from driver's side vents


Asked by meNmy02trailblazer Nov 20, 2007 at 10:44 AM about the 2002 Chevrolet TrailBlazer LTZ

Question type: Maintenance & Repair

HELP! What could be causing the air conditioning unit (this vehicle has dual climate controls) to suddenly be blowing HOT (too hot to leave vents open) air from driver's side vents, but passenger side vents still blow cold? I've tried several times, adjusting the climate control all the way up to 90 degrees and back down to 60. It's been going on now for over a week. My warranty is long gone (76k miles now). I loathe the idea of a visit to the dealer. ($$$)
Any one have this problem before or has anyone heard of this problem? Thanks for the input.

5 Answers


It sounds to me like the mix/blend doors for the drivers side are broken or blocked closed. This would lead hot air coming in from the engine into the driver's side vents, while the passenger side can still blow cold. It is also possible that the climate control head for the dual controls is fried, and the car doesn't recognize input from the driver's side controls. Hate to suggest a trip to the dealer, but you might be able to find a local mechanic who would work on this for less. Climate control problems are almost always expensive.

4 out of 4 people think this is helpful.
Jon Mailander

might be a pressure switch which isnt ot bad to fix. that just happend with mine.

2 out of 2 people think this is helpful.
Zack Salter

try to keep your windows open so u dont get too hot ofcourse and id defiantly go to a mechnic for this problem if u dont it could mean too much moisture would be coming out and it will mess up your seats and wiring in the car and that means radio, heated seats,etc.

1 out of 1 people think this is helpful.

the ltz use electrical motors to control the mix blend doors with automatic air control. the motors can strip the plastic gears and the doors will not move which happened to mine it was still under warranty so it was changed at the dealer they had to remove the dash to get to it because it was on the bottom there is more than one motor so you will have to get it checked to find out which one it is. good luck

1 out of 1 people think this is helpful.

This vehicle has a terrible AC system. Dealer never seems to be able to fix it. Middle row vents have never worked well. LTZ edition has numerous confusing controls. Terrible design.

Your Answer

Add photo

Related Questions

Looking for a Used TrailBlazer in your area?
CarGurus has 5,241 nationwide TrailBlazer listings starting at $165.

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 400
#2 dandyoun
Reputation 390
#3 lindatbrennan
Reputation 330
View All

Related Models For Sale

Used Chevrolet Tahoe"
813 Great Deals out of 32,355 listings starting at $175
Used GMC Envoy"
96 Great Deals out of 2,297 listings starting at $1,995
Used Jeep Grand Cherokee"
1,146 Great Deals out of 66,409 listings starting at $500
Used Ford Explorer"
1,097 Great Deals out of 46,843 listings starting at $850
Used Chevrolet TrailBlazer EXT"
41 Great Deals out of 1,285 listings starting at $2,495
Used Chevrolet Silverado 1500"
2,116 Great Deals out of 138,340 listings starting at $1,982
Used Chevrolet Impala"
1,476 Great Deals out of 45,479 listings starting at $170
Used Chevrolet Blazer"
16 Great Deals out of 1,572 listings starting at $500
Used Dodge Durango"
433 Great Deals out of 23,967 listings starting at $175
Used Ford F-150"
3,065 Great Deals out of 178,974 listings starting at $1,450
Used GMC Yukon"
214 Great Deals out of 8,723 listings starting at $2,495
Used Ford Escape"
1,355 Great Deals out of 92,417 listings starting at $750

Used Cars For Sale

2009 Chevrolet TrailBlazer For Sale
4 Great Deals out of 115 listings starting at $6,493
2008 Chevrolet TrailBlazer For Sale
39 Great Deals out of 717 listings starting at $3,500
2007 Chevrolet TrailBlazer For Sale
34 Great Deals out of 801 listings starting at $165
2006 Chevrolet TrailBlazer For Sale
26 Great Deals out of 822 listings starting at $2,950
2005 Chevrolet TrailBlazer For Sale
26 Great Deals out of 858 listings starting at $1,500