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A/C is warm on drivers side, ice cold on passenger side

Tiny
BROOKES OSBORNE
  • MEMBER
  • 2014 CHEVROLET IMPALA
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 101,000 MILES
For some reason when I turn on the air conditioning in my car the driver side blows warmish air and the passenger side blows ice cold. If I turn the heat on, it works just fine on both sides. It's driving me crazy! Any ideas?

Car listed above is the LTZ model.
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Wednesday, August 7th, 2019 AT 7:21 PM

21 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Welcome to 2CarPros.

It sounds like you have a faulty air temp actuator. The vehicle ha dual climate control, so there are two of them that control the temp, one for the left and one for the right. If the door isn't opening or closing properly, the temperature will be affected.

Take a look through this link. It explains in general how one is replaced. It is referred to as a blend air door actuator in the link. It is the same thing.

https://www.2carpros.com/articles/replace-blend-door-motor

If you look at pictures one and two below, one shows the actuator and the other is the directions for replacement.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Thursday, August 8th, 2019 AT 8:59 PM
Tiny
TREETOPFLYER46
  • MEMBER
  • 1 POST
  • 2007 CHEVROLET IMPALA
  • 100,000 MILES
Drivers side heater temp control not working
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It may be the air vent door actuator.I have attached information on part, HVAC digram view and identification chart to locate left side actuator.
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
MRD2
  • MEMBER
  • 1 POST
  • 2006 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 132,000 MILES
When going from hot to cold air on passenger side hear a clicking noise that continues even when car is shut down. After a minute or so the clicking stops. Also, when running defrost hot air works fine for ten to twenty minutes and hear a clicking noise in dash. Then hot moist air will fog up inside windshield and windows. But after stopping the fan and moving the controls back and forth and restarting the fan in defrost mode the fogging stops. Doesn't sound like a heater core problem when it's intermittent. Have any ideas on what that problem could be?
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like it could be a multi headed problem. I have included a HVAC noise symptom flowchart in the diagrams below to help track down what is going on. The fact that your defrost is blowing moist air would suggest that there is also an issue with the heater core. I have included location and removal guide, also, in the diagrams below. Installation is the the reverse of removal. Let us know what you find out.

Thanks,
Alex
2CarPros
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
AMCKEY
  • MEMBER
  • 9 POSTS
  • 2006 CHEVROLET IMPALA
  • 1.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
When heater is on blows out cold air on passenger side.
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try pulling HVAC fuse inside car for sixty seconds with key on it then reinstall it may reset the actuator. Otherwise the actuator could be bad. Here is a guide to help walk you through the steps and the location of the right side actuator.

https://www.2carpros.com/articles/replace-blend-door-motor

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If so the only actuator to worry about is the passenger side blend door actuator.

Heres a guide to check out on replacing a blend door actuator. Not vehicle specific, but it will give you an idea of what to do

https://www.2carpros.com/articles/replace-blend-door-motor

(1) HVAC Module
(2) Mode Actuator
(3) Air Temperature Actuator (C67), Air Temperature Actuator - Right (CJ3)
(4) Recirculation Actuator
(5) Blower Motor
(6) Blower Motor Control Processor
(7) Air Temperature Actuator - Left (CJ3)

See the diagram below for the locations
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Wednesday, December 23rd, 2020 AT 1:11 PM (Merged)
Tiny
SANCHEZG
  • MEMBER
  • 1 POST
  • 2005 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 91,900 MILES
My car blows cold air on the drivers side and hot air on the passenger side when the heater is selected.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
More than likely, you have a fault with a temperature actuator. The one that deviates from requested, would be the one suspected. There would be a fault code in the system, that would confirm this. Try this actuator recal procedure and see if it restores normal operation, this may be temporary.
Actuator Recalibration
Calibration Procedure
Use the following steps to perform the calibration update:

Turn OFF the ignition.
Remove the battery positive voltage circuit fuse of the HVAC Control Module.
Important: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.

Wait 60 seconds.
Install the fuse.
Wait 60 seconds before moving the HVAC controls.

The fuse that powers the HVAC module, is the DIC/RKE fuse in the RH junction block, behind the right side instrument panel access panel. I am not sure what the collateral may be for removing this fuse, since it has the letters RKE in the heading. It may lose the remote keyless entry programming.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
CLARKBAR69
  • MEMBER
  • 3 POSTS
  • 2005 CHEVROLET IMPALA
  • 70,000 MILES
The car has a dual heating switch. I replaced the heater control module thinking it was that but it was blowing air just not getting warm on the drivers side.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
With dual climate control, you have two blend air doors. They are designed to control the amount of heat or cold air entering the vehicle. It sounds like one is stuck. Both are located near the heater core HVAC box. Check to see if they are both working (opening and closing).
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
CLARKBAR69
  • MEMBER
  • 3 POSTS
Thanks for this post I got a new actuator and installed it myself for $76.00 all fixed! I love this site.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
CLARKBAR69
  • MEMBER
  • 3 POSTS
Thanks again.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
You're welcome. Let me know if you have other questions.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
B.EDGE
  • MEMBER
  • 4 POSTS
  • 2005 CHEVROLET IMPALA
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 150,090 MILES
When dual climate control both are set to cold and A/C is on the passenger side gets cold air but driver gets warm. How do I fix this problem?
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

It is very possible the blend door motor on the driver's side is not working.

Very common failure.

Roy

REMOVAL PROCEDURE
1. Remove the left instrument panel (I/P) insulator.
2. Remove the knee bolster bracket bracket.
3. Disconnect the electrical connector from the left air temperature actuator.
4. Remove the mounting screws from the left air temperature actuator.
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
REDNECKNUT
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 68,000 MILES
I have dual climate control pass. Side works great but the drivers side just blows cold air everything else works
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Sounds like you have a bad temp actuator for the drivers side. You can remove it and check and make sure the blend door isnt binding
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Wednesday, December 23rd, 2020 AT 1:12 PM (Merged)
Tiny
EWELLS
  • MEMBER
  • 1 POST
  • CHEVROLET IMPALA
Hello,

I have a 2000 Chevy Impala with 76,000 miles. It has the 3.4 L engine (the non-SS model). The AC blows nice and cold on the passenger side, but no cold air blows from the driver side. It does not have dual climate control. Any ideas on what to look for?

Thanks!
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Wednesday, December 23rd, 2020 AT 1:13 PM (Merged)

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