Question about 2006 Chevrolet Trailblazer

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Air diverter only diverts blown air to feet or defroster.

The air blower on my 2006 Chevrolet TrailBlazer will only divert blown air to the feet or to the defogger/defroster. It will continue to blow air on the other settings but the source will remain at the feet, or if the selector is moved to the appropriate setting, the defogger/defroster. It appears that all fan speeds are working properly.

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Its a hvac mode accuator it controls where the air blows i have the same problem with my envoy waiting on the part in the mail its up under the dash. the part is vin specific so check for the part number with a dealer they told me $103 but i found one online for $57

Posted on Feb 24, 2010

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My 2005 ford focus ... the defroster button is on defrost and no air comes out of the defroster to the front windshield but blows out at your face and feet??? trying to get this fixed before snow flies...


well if it blows out at your feet you know the blower is running (as it's a common problem for blower motor shaft to rust up from AC condensate drain plugged up) but in your case it sounds like the air diverter damper arm actuator is broken or just stuck (yes it can rust too) you'll need to remove toe space cover to gain access to it on passenger side floor move heater contol back and forth to watch it move Or (NOT) you may have to free this up or replace it

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I would guess that its either a controller or one of the valves themselves. Odds are, it is a controller. That tends to be what malfunctions first.

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Defrost blows constantly? How do i fix it?


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You may have lost vacuum to the air diverter. Or the diverter is plugged with something. Been sitting all winter?

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A/C Vents


cable lock mechanism on air diverter plate is broken.probably at control panel rear arm point. haynes manuel at auto parts store shows repair procedures.

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I put a new stereo in to my 04 trailblazer and now the air will only blow out of the defrost vents and the bottom and no longer will it blow out the concel vents. i looked and the vents are inline and not...


Sounds like you may have disconnected the cable that diverts the blower ducts up and down. Sorry but the radio may have to come out again to access it.

Apr 22, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

The air selector for the heater/air conditioner moves but the air only comes out of the defroster. I need to know how to remove the console to see if the connector is broken. Can anyone help?


under the dashboard just above the gas pedal is the actuator rod to divert airflow from defrost to floor and vents. This may have come detached. move the wire/rod until it can be re-attached on the diverter door and wire-tie it on.

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Have you checked the diverter doors under the dash??
It sounds like a vaccum hose may have fallen off your vent controller.
I have had similar problems and found that the air WAS moving, but it was all going up through the defrost vents at the windshield.
A quick check of the vac. lines showed that one under the glove box was pulled off.
with the engine running, try setting the air settings to all the options ( vent/floor/defrost..etc..)
See it you can feel or hear the diverters moving under the dash..

Jul 02, 2008 | 1994 Chevrolet Lumina APV

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