Driver side A/C vents are putting out warm air

Tiny
MTHEEL
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 72,000 MILES
When I turn the A/C on the driver side vents are putting out warm air. The passenger side vents are putting out cold air. Both controls are all the way down to max cool, blower is operating at 5, help.
Monday, May 24th, 2010 AT 4:00 PM

2 Replies

Tiny
BRIAN 1
  • MECHANIC
  • 1,030 POSTS
You have two different problems here. For the blower speed replace the blower resister and connector, that will fix the blower speed problem. The other problem is a mode door actuator problem, on these vehicles they have a left and right side actuators. I would start by checking the left side.
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Monday, May 24th, 2010 AT 4:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi and thanks for using 2CarPros. Com. Brian 1 is exactly right. There are two different systems, automatic climate control and manual. I am going to start with automatic.

Here are the directions specific to your vehicle for replacing the right blend air door actuator:

AIR TEMPERATURE ACTUATOR REPLACEMENT - RIGHT

REMOVAL PROCEDURE
Remove the I/P carrier.

Remove the air temperature actuator-right retaining screws.
Disconnect the air temperature actuator-right electrical connector.
Remove the air temperature actuator-right.
INSTALLATION PROCEDURE

Install the air temperature actuator-right.
Tighten the air temperature actuator-right retaining screws.
NOTE: Refer to Fastener Notice in Service Precautions.
See: Service PrecautionsVehicle Damage Warnings
Tighten
Tighten the screws to 1.9 N.M (17 lb ft).

Install the air temperature actuator-right electrical connector.
Install the I/P carrier.
Recalibrate the air temperature actuator on vehicles equipped with automatic climate control

The first two pictures show the location of the component.

Here are the directions for the manual climate control system which are specific to your vehicle.

AIR TEMPERATURE ACTUATOR REPLACEMENT - RIGHT

REMOVAL PROCEDURE
Remove the I/P carrier.

Remove the right side air temperature actuator retaining screws.
Disconnect the right side air temperature actuator electrical connector.
Remove the right side air temperature actuator.
INSTALLATION PROCEDURE

Install the right side air temperature actuator.
Install the right side air temperature actuator retaining screws.
NOTE: Refer to Fastener Notice in Service Precautions.
See: Service PrecautionsVehicle Damage Warnings
Tighten
Tighten the screws to 1.9 N.M (17 lb in).

Connect the right side air temperature actuator electrical connector.
Install the I/P carrier.

The 3rd pic is that of the manual system.

As for the blower motor resister, here are the directions for removal and replacement specific to your vehicle. Picture 4 shows the resister location.

BLOWER MOTOR RESISTOR ASSEMBLY REPLACEMENT

REMOVAL PROCEDURE
Remove the right closeout/insulator panel.

Disconnect the blower motor resistor electrical connector (3).
Remove the blower motor resistor mounting screws (2).
Remove the blower motor resistor (1).
INSTALLATION PROCEDURE

Install the blower motor resistor (1).
Install the blower motor resistor mounting screws (2).
NOTE: Refer to Fastener Notice in Service Precautions.
See: Service PrecautionsVehicle Damage Warnings
Tighten
Tighten the screws to.1.9 N.M (17 lb in).

Connect the blower motor resistor electrical connector (3).
Install the right closeout/insulator panel.

All aforementioned components are located under the dash of the vehicle on the passenger side. It will require removal of dust cover which is above where your feet set. Additionally, removal of the glove box will help. Finally, I recommend disconnecting the battery and waiting for at least fifteen minutes prior to starting. There is an air bag on the passenger side and I do not want anything to happen.

I hope this helps.

Cheers,
Joe
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Saturday, May 12th, 2018 AT 8:23 PM

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