Heat only on one side?

Tiny
JADEW19
  • MEMBER
  • 2005 CHEVROLET TRAILBLAZER
  • 3.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 175,632 MILES
My heat had stopped working a few weeks ago And I wasn’t exactly positive what the problem was so I started with the blower motor and it was fine then I checked the climate control knob’s which ended up not being the problem but when I was putting it back together and back in its spot...I broke the knob/lever that moves up and down to control the temperature on the passenger side so now the passenger side is stuck on cold. So, now I’m trying to find where the door/flap is located so that I can manually pull it up so that it will constantly blow heat just until I can afford to buy a new climate control and put in. Or is it possible to pull a certain wire that would completely stop any and all air from even blowing out from the passenger side? I know that’s not the correct way of handling this problem but it’s freezing outside right now, and a climate control module is going to cost close to $300. Any and all help is greatly appreciated!
Friday, January 24th, 2025 AT 2:54 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,029 POSTS
Hi,

If you look below, I attached a schematic that indicates the power supply to the air temp actuator on the right is brown. You would need to disconnect that wire.

The second pic shows the actuator location on a manual climate control system. Pic 3 shows the actuator with automatic climate control. I'm not sure which you have.

Starting with pic 4 are the directions for replacing the actuator.

Let me know if this helps.

Joe

See pics below.
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Friday, January 24th, 2025 AT 6:39 PM
Tiny
JADEW19
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  • 3 POSTS
Okay, so once I unhook the brown wire, then that will stop the air flow from coming out of the passenger side, right! So, therefore instead of it blowing cold air out, it won’t blow any air out on that side. And mine is a manual climate control.
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Friday, January 24th, 2025 AT 7:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,029 POSTS
No, if you disconnect that wire, it will still blow air, but the actuator won't move the door anymore. So, wherever it is positioned won't change.

If I had to deal with this, I would remove the actuator and then adjust the blend door to heat until it can be repaired.

Let me know if that helps.

Joe
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Saturday, January 25th, 2025 AT 8:26 PM
Tiny
JADEW19
  • MEMBER
  • 3 POSTS
Oksy. So, that actuator that you’re telling me to remove to adjust the blend door looks like it is back behind the blower motor, is that correct?
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Saturday, January 25th, 2025 AT 9:16 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,029 POSTS
Hi,

Yes, that sounds correct. Once you remove it, you can manually move the door. You will need to do something to prevent it from moving once you get it in the position you want.

Let me know how you make out.

Joe
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Saturday, January 25th, 2025 AT 10:59 PM

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