AC blows just cold air

foreigner

TYF Newbie
Joined
Sep 6, 2021
Posts
1
Reaction score
0
Hi all

I'm the new guy, i guess. First of all: Please excuse my bad english (my nickname stands for itself :), but i hope, that I'll find some help here.

My 2005 Tahoe's AC blows just cold air (driver, passenger, rear) no matter what I do. I've read many Threads here (and in the "other Internet :) ) and thought that it might be a faulty actuator, so what I did:

-did the "reset"-thing (take fuse out, recalibrate AC and so on... ->still cold
-replaced the blend door actuator ->still cold
-did the "reset/calibration" after the actuator change again ->still cold

What makes me wonder is:
When I perform the recalibration (fuse out/in) -now, the actuator is replaced- the AC is cycling through all "modes" of the AC as you know...and THERE it's getting warm but just for the moment during the calibration. (?!)

My Climate Control (it's an Auto) seems to work, at least there is no "temperature hopping", when I push the Dials. Or is it possible that the Control is broken?

I would be very grateful, if I would find some advise what this problem could be and how to solve it.

Thanks for your time and have a nice day :)
 
Last edited:

rockola1971

Full Access Member
Joined
Dec 29, 2016
Posts
1,099
Reaction score
637
Location
Indiana (formerly IL)
I sure am confused. Your AC blows just cold air? Thats what it is suppose to do. You state your "Climate control (auto) seems to work"? But the rest seems to say that you have no heat? What does your temp become out of the vents (Hot, cold, warm) when you set the temp on the control head for say 80 deg? What is the temp in your area approximately when you are testing?
You may have damaged the actuator, incorrectly installed it or even replaced the wrong one thinking it was the blend door. What was the area of the one you replaced? Did the matchmark lines line up and did you align your blend door to the actuator matchmarks. It is possible that your system was originally so far out of cal that when you put the new actuator in at zero position but blend door was in a negtative or positive position which could damage the actuator or cause the system to be lost or never achieve target position one way or the other.
 

PNW VietVet

CCW
Supporting Member
Joined
Oct 8, 2014
Posts
10,789
Reaction score
11,625
Location
LIMBO
Welcome to the forum.

I was confused too and read it twice to be sure I did not miss something. Let's see, a/c's job, blow cold air, CHECK!
 

swathdiver

Full Access Member
Joined
May 18, 2017
Posts
13,885
Reaction score
15,234
Location
Treasure Coast, Florida
Hi all

I'm the new guy, i guess. First of all: Please excuse my bad english (my nickname stands for itself :), but i hope, that I'll find some help here.

My 2005 Tahoe's AC blows just cold air (driver, passenger, rear) no matter what I do. I've read many Threads here (and in the "other Internet :) ) and thought that it might be a faulty actuator, so what I did:

-did the "reset"-thing (take fuse out, recalibrate AC and so on... ->still cold
-replaced the blend door actuator ->still cold
-did the "reset/calibration" after the actuator change again ->still cold

What makes me wonder is:
When I perform the recalibration (fuse out/in) -now, the actuator is replaced- the AC is cycling through all "modes" of the AC as you know...and THERE it's getting warm but just for the moment during the calibration. (?!)

My Climate Control (it's an Auto) seems to work, at least there is no "temperature hopping", when I push the Dials. Or is it possible that the Control is broken?

I would be very grateful, if I would find some advise what this problem could be and how to solve it.

Thanks for your time and have a nice day :)
There are four actuators up front. One for the driver and passenger. The mode actuator which controls which setting and is accessed from the driver's footwell. Finally, there's the recirculate actuator, which allows fresh air in or not.

You really need a Tech-2 to work on this, you should be able to get one and it can see and test your actuators and show you the internal trouble codes.
 

Forum statistics

Threads
114,490
Posts
1,561,043
Members
73,156
Latest member
Giovanell88
Top